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Wikipedia

Windows XP

January 04, 2023

Windows XP is a major release of Microsoft's Windows NT operating system. It was released to manufacturing on August 24, 2001, and later to retail on October 25, 2001. It is a direct upgrade to its predecessors, Windows 2000 for high-end and business users and Windows Me for home users, available for any devices running Windows NT 4.0, Windows 98, Windows 2000 and Windows Me that meet the new Windows XP system requirements.

Windows XP
Version of the Windows NT operating system
Screenshot of Windows XP running the Luna visual style, showing the start menu, taskbar, and My Computer window
DeveloperMicrosoft
Source model
Released to
manufacturing		August 24, 2001; 21 years ago (2001-08-24)[2]
General
availability		October 25, 2001; 21 years ago (2001-10-25)[2]
Final releaseService Pack 3 (5.1.2600.5512) / April 21, 2008; 14 years ago (2008-04-21)[3]
Marketing targetConsumer and Business
Update method
PlatformsIA-32, x86-64, and Itanium
Kernel typeHybrid (NT)
Userland
LicenseProprietary commercial software
Preceded by
Succeeded byWindows Vista (2007)
Official website (archived at Wayback Machine)
Support status
All editions except Windows XP Embedded, Windows XP 64-bit Edition, Windows Embedded for Point of Service, Windows Embedded Standard 2009 and Windows Embedded POSReady 2009:
  • Mainstream support ended on April 14, 2009[4]
  • Extended support ended on April 8, 2014[4]

Windows XP 64-bit Edition:

  • Unsupported as of June 30, 2005[5]

Windows XP Embedded:

  • Mainstream support ended on January 11, 2011[4]
  • Extended support ended on January 12, 2016[4]

Windows Embedded for Point of Service:

  • Mainstream support ended on April 12, 2011[6]
  • Extended support ended on April 12, 2016[6]

Windows Embedded Standard 2009:

  • Mainstream support ended on January 14, 2014[7]
  • Extended support ended on January 8, 2019[7]

Windows Embedded POSReady 2009:

  • Mainstream support ended on April 8, 2014[8]
  • Extended support ended on April 9, 2019[8]

Development of Windows XP began in the late 1990s under the codename "Neptune", built on the Windows NT kernel explicitly intended for mainstream consumer use. An updated version of Windows 2000 was also initially planned for the business market. However, in January 2000, both projects were scrapped in favor of a single OS codenamed "Whistler", which would serve as a single platform for both consumer and business markets. As a result, Windows XP is the first consumer edition of Windows not based on the Windows 95 kernel and MS-DOS. Windows XP removed support for PC-98, i486 and SGI Visual Workstation 320 and 540 and will only run on 32-bit x86 CPUs and devices which use BIOS firmware.

Upon its release, Windows XP received critical acclaim, noting increased performance and stability (especially compared to Windows Me), a more intuitive user interface, improved hardware support, and expanded multimedia capabilities. Windows XP and Windows Server 2003 were succeeded by Windows Vista and Windows Server 2008, released in 2007 and 2008, respectively.

Mainstream support for Windows XP ended on April 14, 2009, and extended support ended on April 8, 2014. Windows Embedded POSReady 2009, based on Windows XP Professional, received security updates until April 2019. After that, unofficial methods were made available to apply the updates to other editions of Windows XP. Still, Microsoft discouraged this practice, citing compatibility issues.[9] However, over eight years from the end of life date (September 2022), the majority of PCs in some countries (such as Armenia) still appeared to be running on Windows XP.[10] As of September 2022, globally, just 0.39% of Windows PCs[11] and 0.1% of all devices across all platforms continue to run Windows XP.

Development

Main article: Development of Windows XP

In the late 1990s, initial development of what would become Windows XP was focused on two individual products: "Odyssey", which was reportedly intended to succeed the future Windows 2000 and "Neptune", which was reportedly a consumer-oriented operating system using the Windows NT architecture, succeeding the MS-DOS-based Windows 98.[12]

However, the projects proved to be too ambitious. In January 2000, shortly prior to the official release of Windows 2000, technology writer Paul Thurrott reported that Microsoft had shelved both Neptune and Odyssey in favor of a new product codenamed "Whistler", named after Whistler, British Columbia, as many Microsoft employees skied at the Whistler-Blackcomb ski resort.[13] The goal of Whistler was to unify both the consumer and business-oriented Windows lines under a single, Windows NT platform. Thurrott stated that Neptune had become "a black hole when all the features that were cut from Windows Me were simply re-tagged as Neptune features. And since Neptune and Odyssey would be based on the same code-base anyway, it made sense to combine them into a single project".[14]

At PDC on July 13, 2000, Microsoft announced that Whistler would be released during the second half of 2001, and also unveiled the first preview build, 2250, which featured an early implementation of Windows XP's visual styles system and interface changes to Windows Explorer and the Control Panel.[15]

Microsoft released the first public beta build of Whistler, build 2296, on October 31, 2000. Subsequent builds gradually introduced features that users of the release version of Windows XP would recognize, such as Internet Explorer 6.0, the Microsoft Product Activation system and the Bliss desktop background.[16]

Whistler was officially unveiled during a media event on February 5, 2001, under the name Windows XP, where XP stands for "eXPerience".[17]

Release

In June 2001, Microsoft indicated that it was planning to spend at least US$1 billion on marketing and promoting Windows XP, in conjunction with Intel and other PC makers.[18] The theme of the campaign, "Yes You Can", was designed to emphasize the platform's overall capabilities. Microsoft had originally planned to use the slogan "Prepare to Fly", but it was replaced because of sensitivity issues in the wake of the September 11 attacks.[19]

On August 24, 2001, Windows XP build 2600 was released to manufacturing (RTM). During a ceremonial media event at Microsoft Redmond Campus, copies of the RTM build were given to representatives of several major PC manufacturers in briefcases, who then flew off on decorated helicopters. While PC manufacturers would be able to release devices running XP beginning on September 24, 2001, XP was expected to reach general, retail availability on October 25, 2001. On the same day, Microsoft also announced the final retail pricing of XP's two main editions, "Home" (as a replacement for Windows Me for home computing) and "Professional" (as a replacement for Windows 2000 for high-end users).[20]

New and updated features

Main article: Features new to Windows XP

User interface

 
Updated start menu in the Media Center Edition-exclusive Royale theme, now featuring two columns

While retaining some similarities to previous versions, Windows XP's interface was overhauled with a new visual appearance, with an increased use of alpha compositing effects, drop shadows, and "visual styles", which completely changed the appearance of the operating system. The number of effects enabled are determined by the operating system based on the computer's processing power, and can be enabled or disabled on a case-by-case basis. XP also added ClearType, a new subpixel rendering system designed to improve the appearance of fonts on liquid-crystal displays.[21] A new set of system icons was also introduced.[22] The default wallpaper, Bliss, is a photo of a landscape in the Napa Valley outside Napa, California, with rolling green hills and a blue sky with stratocumulus and cirrus clouds.[23]

The Start menu received its first major overhaul in XP, switching to a two-column layout with the ability to list, pin, and display frequently used applications, recently opened documents, and the traditional cascading "All Programs" menu. The taskbar can now group windows opened by a single application into one taskbar button, with a popup menu listing the individual windows. The notification area also hides "inactive" icons by default. A "common tasks" list was added, and Windows Explorer's sidebar was updated to use a new task-based design with lists of common actions; the tasks displayed are contextually relevant to the type of content in a folder (e.g. a folder with music displays offers to play all the files in the folder, or burn them to a CD).[24]

 
The "task grouping" feature introduced in Windows XP showing both grouped and individual items

Fast user switching allows additional users to log into a Windows XP machine without existing users having to close their programs and log out. Although only one user at the time can use the console (i.e. monitor, keyboard, and mouse), previous users can resume their session once they regain control of the console.[25] Service Pack 2 and Service Pack 3 also introduced new features to Windows XP post-release, including the Windows Security Center, Bluetooth support, the executable space protection, Windows Firewall, and support for SDHC cards that are larger than 4 GB and smaller than 32 GB.[26][27][28][29]

Infrastructure

Windows XP uses prefetching to improve startup and application launch times.[30] It also became possible to revert the installation of an updated device driver, should the updated driver produce undesirable results.[31]

A copy protection system known as Windows Product Activation was introduced with Windows XP and its server counterpart, Windows Server 2003. All Windows licenses must be tied to a unique ID generated using information from the computer hardware, transmitted either via the internet or a telephone hotline. If Windows is not activated within 30 days of installation, the OS will cease to function until it is activated. Windows also periodically verifies the hardware to check for changes. If significant hardware changes are detected, the activation is voided, and Windows must be re-activated.[32]

Networking and internet functionality

Windows XP was originally bundled with Internet Explorer 6, Outlook Express 6, Windows Messenger, and MSN Explorer. New networking features were also added, including Internet Connection Firewall, Internet Connection Sharing integration with UPnP, NAT traversal APIs, Quality of Service features, IPv6 and Teredo tunneling, Background Intelligent Transfer Service, extended fax features, network bridging, peer to peer networking, support for most DSL modems, IEEE 802.11 (Wi-Fi) connections with auto configuration and roaming, TAPI 3.1, and networking over FireWire.[33] Remote Assistance and Remote Desktop were also added, which allow users to connect to a computer running Windows XP from across a network or the Internet and access their applications, files, printers, and devices or request help.[34] Improvements were also made to IntelliMirror features such as Offline Files, Roaming user profiles and Folder redirection.[35]

Backwards compatibility

To enable running software that targets or locks out specific versions of Windows, "Compatibility mode" was added. The feature allows pretending a selected earlier version of Windows to software, starting at Windows 95.[36]

While this ability was first introduced in Windows 2000 Service Pack 2, it had to be activated through the "register server" and was only available to administrator users, whereas Windows XP has it activated out of the box and also grants it to regular users.[37]

Other features

Removed features

Main article: List of features removed in Windows XP

Some of the programs and features that were part of the previous versions of Windows did not make it to Windows XP. Various MS-DOS commands available in its Windows 9x predecessor were removed,[51] as were the POSIX and OS/2 subsystems.[52]

In networking, NetBEUI, NWLink and NetDDE were deprecated and not installed by default.[53] Plug-and-play–incompatible communication devices (like modems and network interface cards) were no longer supported.[54]

Service Pack 2 and Service Pack 3 also removed features from Windows XP, including support for TCP half-open connections[55] and the address bar on the taskbar.[56]

Editions

Main article: Windows XP editions
 
Diagram representing the main editions of Windows XP. It is based on the category of the edition (grey) and codebase (black arrow).

Windows XP was released in two major editions on launch: Home Edition and Professional Edition. Both editions were made available at retail as pre-loaded software on new computers and as boxed copies. Boxed copies were sold as "Upgrade" or "Full" licenses; the "Upgrade" versions were slightly cheaper, but require an existing version of Windows to install. The "Full" version can be installed on systems without an operating system or existing version of Windows.[18] The two editions of XP were aimed at different markets: Home Edition is explicitly intended for consumer use and disables or removes certain advanced and enterprise-oriented features present on Professional, such as the ability to join a Windows domain, Internet Information Services, and Multilingual User Interface. Windows 98 or Me can be upgraded to either edition, but Windows NT 4.0 and Windows 2000 can only be upgraded to Professional.[57] Windows' software license agreement for pre-loaded licenses allows the software to be "returned" to the OEM for a refund if the user does not wish to use it.[58] Despite the refusal of some manufacturers to honor the entitlement, it has been enforced by courts in some countries.[59]

Two specialized variants of XP were introduced in 2002 for certain types of hardware, exclusively through OEM channels as pre-loaded software. Windows XP Media Center Edition was initially designed for high-end home theater PCs with TV tuners (marketed under the term "Media Center PC"), offering expanded multimedia functionality, an electronic program guide, and digital video recorder (DVR) support through the Windows Media Center application.[60] Microsoft also unveiled Windows XP Tablet PC Edition, which contains additional pen input features, and is optimized for mobile devices meeting its Tablet PC specifications.[61] Two different 64-bit editions of XP were made available. The first, Windows XP 64-Bit Edition, was intended for IA-64 (Itanium) systems; as IA-64 usage declined on workstations in favor of AMD's x86-64 architecture, the Itanium edition was discontinued in January 2005.[62] A new 64-bit edition supporting the x86-64 architecture, called Windows XP Professional x64 Edition, was released in April of the same year.[63]

Microsoft also targeted emerging markets with the 2004 introduction of Windows XP Starter Edition, a special variant of Home Edition intended for low-cost PCs. The OS is primarily aimed at first-time computer owners, containing heavy localization (including wallpapers and screen savers incorporating images of local landmarks), and a "My Support" area which contains video tutorials on basic computing tasks. It also removes certain "complex" features, and does not allow users to run more than three applications at a time. After a pilot program in India and Thailand, Starter was released in other emerging markets throughout 2005.[64] In 2006, Microsoft also unveiled the FlexGo initiative, which would also target emerging markets with subsidized PCs on a pre-paid, subscription basis.[65]

As a result of unfair competition lawsuits in Europe and South Korea, which both alleged that Microsoft had improperly leveraged its status in the PC market to favor its own bundled software, Microsoft was ordered to release special editions of XP in these markets that excluded certain applications. In March 2004, after the European Commission fined Microsoft €497 million (US$603 million), Microsoft was ordered to release "N" editions of XP that excluded Windows Media Player, encouraging users to pick and download their own media player software.[66] As it was sold at the same price as the edition with Windows Media Player included, certain OEMs (such as Dell, who offered it for a short period, along with Hewlett-Packard, Lenovo and Fujitsu Siemens) chose not to offer it. Consumer interest was minuscule, with roughly 1,500 units shipped to OEMs, and no reported sales to consumers.[67] In December 2005, the Korean Fair Trade Commission ordered Microsoft to make available editions of Windows XP and Windows Server 2003 that do not contain Windows Media Player or Windows Messenger.[68] The "K" and "KN" editions of Windows XP were released in August 2006, and are only available in English and Korean, and also contain links to third-party instant messenger and media player software.[69]

Service packs

A service pack is a cumulative update package that is a superset of all updates, and even service packs, that have been released before it.[70] Three service packs have been released for Windows XP. Service Pack 3 is slightly different, in that it needs at least Service Pack 1 to have been installed, in order to update a live OS.[71] However, Service Pack 3 can still be embedded into a Windows installation disc; SP1 is not reported as a prerequisite for doing so.[72]

The unique boot screens from the RTM to Service Pack 1 versions of Windows XP that identified the edition of Windows XP currently running, including a green progress bar for Home Edition and a blue progress bar for Professional, Embedded, Tablet PC Edition, and Media Center Edition were removed in Service Pack 2 of Windows XP and was replaced with a generic "Windows XP" boot screen with a blue progress bar.

Service Pack 1

Service Pack 1 (SP1) for Windows XP was released on September 9, 2002. It contained over 300 minor, post-RTM bug fixes, along with all security patches released since the original release of XP. SP1 also added USB 2.0 support, the Microsoft Java Virtual Machine, .NET Framework support, and support for technologies used by the then-upcoming Media Center and Tablet PC editions of XP.[73] The most significant change on SP1 was the addition of Set Program Access and Defaults, a settings page which allows programs to be set as default for certain types of activities (such as media players or web browsers) and for access to bundled, Microsoft programs (such as Internet Explorer or Windows Media Player) to be disabled. This feature was added to comply with the settlement of United States v. Microsoft Corp., which required Microsoft to offer the ability for OEMs to bundle third-party competitors to software it bundles with Windows (such as Internet Explorer and Windows Media Player), and give them the same level of prominence as those normally bundled with the OS.[74]

On February 3, 2003, Microsoft released Service Pack 1a (SP1a). It was the same as SP1, except, the Microsoft Java Virtual Machine was excluded.[75]

Service Pack 2

 
Windows Security Center window running Windows XP Service Pack 2, showing no virus protection installed

Service Pack 2 (SP2) for Windows XP Home edition and Professional edition was released on August 25, 2004.[76] Headline features included WPA encryption compatibility for Wi-Fi and usability improvements to the Wi-Fi networking user interface,[77] partial Bluetooth support,[78] and various improvements to security systems.

Headed by former computer hacker Window Snyder,[79][80] the service pack's security improvements (codenamed "Springboard",[81] as these features were intended to underpin additional changes in Longhorn) included a major revision to the included firewall (renamed Windows Firewall, and now enabled by default), and an update to Data Execution Prevention, which gained hardware support in the NX bit that can stop some forms of buffer overflow attacks. Raw socket support is removed (which supposedly limits the damage done by zombie machines) and the Windows Messenger service (which had been abused to cause pop-up advertisements to be displayed as system messages without a web browser or any additional software) became disabled by default. Additionally, security-related improvements were made to e-mail and web browsing. Service Pack 2 also added Security Center, an interface that provides a general overview of the system's security status, including the state of the firewall and automatic updates. Third-party firewall and antivirus software can also be monitored from Security Center.[82]

In August 2006, Microsoft released updated installation media for Windows XP and Windows Server 2003 SP2 (SP2b), in order to incorporate a patch requiring ActiveX controls in Internet Explorer to be manually activated before a user may interact with them. This was done so that the browser would not violate a patent owned by Eolas.[83] Microsoft has since licensed the patent, and released a patch reverting the change in April 2008.[84] In September 2007, another minor revision known as SP2c was released for XP Professional, extending the number of available product keys for the operating system to "support the continued availability of Windows XP Professional through the scheduled system builder channel end-of-life (EOL) date of January 31, 2009."[85]

Windows XP Service Pack 2 was later included in Windows Embedded for Point of Service and Windows Fundamentals for Legacy PCs.

Service Pack 3

The third and final Service Pack, SP3, was released through different channels between April[3] and June 2008,[86] about a year after the release of Windows Vista, and about a year before the release of Windows 7. Service Pack 3 was not available for Windows XP x64 Edition, which was based on the Windows Server 2003 kernel and, as a result, used its service packs[87] rather than the ones for the other editions.[88]

It began being automatically pushed out to Automatic Updates users on July 10, 2008.[89] A feature set overview which detailed new features available separately as stand-alone updates to Windows XP, as well as backported features from Windows Vista, was posted by Microsoft.[90] A total of 1,174 fixes are included in SP3.[91] Service Pack 3 could be installed on systems with Internet Explorer up to and including version 8; Internet Explorer 7 was not included as part of SP3.[92] It also did not include Internet Explorer 8, but instead was included in Windows 7, which was released one year after XP SP3.

Service Pack 3 included security enhancements over and above those of SP2, including APIs allowing developers to enable Data Execution Prevention for their code, independent of system-wide compatibility enforcement settings,[93] the Security Support Provider Interface,[94] improvements to WPA2 security,[95] and an updated version of the Microsoft Enhanced Cryptographic Provider Module that is FIPS 140-2 certified.[96]

In incorporating all previously released updates not included in SP2, Service Pack 3 included many other key features. Windows Imaging Component allowed camera vendors to integrate their own proprietary image codecs with the operating system's features, such as thumbnails and slideshows.[97] In enterprise features, Remote Desktop Protocol 6.1 included support for ClearType and 32-bit color depth over RDP,[98] while improvements made to Windows Management Instrumentation in Windows Vista to reduce the possibility of corruption of the WMI repository were backported to XP SP3.[99]

In addition, SP3 contains updates to the operating system components of Windows XP Media Center Edition (MCE) and Windows XP Tablet PC Edition, and security updates for .NET Framework version 1.0, which is included in these editions. However, it does not include update rollups for the Windows Media Center application in Windows XP MCE 2005.[100] SP3 also omits security updates for Windows Media Player 10, although the player is included in Windows XP MCE 2005.[100] The Address Bar DeskBand on the Taskbar is no longer included because of antitrust violation concerns.[101]

Unofficial SP3 ZIP download packages were released on a now-defunct website called The Hotfix from 2005 to 2007.[102][103] The owner of the website, Ethan C. Allen, was a former Microsoft employee in Software Quality Assurance and would comb through the Microsoft Knowledge Base articles daily and download new hotfixes Microsoft would put online within the articles. The articles would have a "kbwinxppresp3fix" and/or "kbwinxpsp3fix" tag, thus allowing Allen to easily find and determine which fixes were planned for the official SP3 release to come. Microsoft publicly stated at the time that the SP3 pack was unofficial and advised users to not install it.[104][105] Allen also released a Vista SP1 package in 2007, for which Allen received a cease-and-desist email from Microsoft.[106]

Windows XP Service Pack 3 was later included in Windows Embedded Standard 2009 and Windows Embedded POSReady 2009.

System requirements

System requirements for Windows XP are as follows:

System requirements
Minimum Recommended
Home/Professional Edition[A]
CPU
Memory 64 MB[E][F]128 MB
Free space
  • +661 MB for Service Pack 1 and 1a[G]
  • +1.8 GB for Service Pack 2[H]
  • +900 MB for Service Pack 3[I]
Media CD-ROM drive or compatible
Display Super VGA (800 × 600)
Sound hardware N/ASound card plus speakers/headphones
Input device(s) Keyboard, mouse
Professional x64 Edition[J]
CPU
Memory 256 MB
Free space
Media CD-ROM drive or compatible
Display Super VGA (800 × 600)
Sound hardware N/ASound card plus speakers/headphones
Input device(s) Keyboard, mouse
64-Bit Edition[K]
CPU Itanium 733 MHzItanium 800 MHz
Memory 1 GB
Free space 6 GB
Media CD-ROM drive or compatible
Display Super VGA (800 × 600)
Input device(s) Keyboard, mouse

Notes

  1. ^ "System requirements for Windows XP operating systems". April 28, 2005. from the original on August 6, 2011. Retrieved March 12, 2007.
  2. ^ Even though this is Microsoft's stated minimum processor speed for Windows XP, it is possible to install and run the operating system on early IA-32 processors such as a P5 Pentium without MMX instructions. Windows XP is not compatible with processors older than Pentium (such as 486) or the Cyrix 6x86 because it requires CMPXCHG8B (see Pentium F00F bug) instructions.
  3. ^ "Windows XP Minimal Requirement Test". Winhistory.de. September 9, 2011. from the original on December 21, 2011. Retrieved January 1, 2012.
  4. ^ a b c d e "Windows XP: Required firmware and partition mapping scheme of hard disk drive". Support.microsoft.com. June 26, 2013. from the original on April 27, 2017. Retrieved June 16, 2014.
  5. ^ A Microsoft TechNet paper from Summer 2001 (before Windows XP's actual release), states that: "A computer with 64 MB of RAM will have sufficient resources to run Windows XP and a few applications with moderate memory requirements." (Emphasis added.) These were said to be office productivity applications, e-mail programs, and web browsers (of the time). With such a configuration, user interface enhancements and fast user switching are turned off by default. For comparable workloads, 64 MB of RAM was then regarded as providing an equal or better user experience on Windows XP with similar settings than it would with Windows Me on the same hardware. In a later section of the paper, superior performance over Windows Me was noted with 128 MB of RAM or more, and with computers that exceed the minimum hardware requirements.
  6. ^ Sechrest, Stuart; Fortin, Michael (June 1, 2001). "Windows XP Performance". Microsoft TechNet. from the original on July 27, 2010. Retrieved April 8, 2008.
  7. ^ "Hard disk space requirements for Windows XP Service Pack 1". Microsoft. October 29, 2007. from the original on April 21, 2012. Retrieved April 6, 2012.
  8. ^ "The hard disk space requirements for Windows XP Service Pack 2". Microsoft. April 18, 2005. from the original on November 24, 2010. Retrieved December 1, 2010.
  9. ^ "Windows XP – End of Support, Migration Guide, Download – TechNet". technet.microsoft.com. 2007. from the original on May 13, 2008.
  10. ^ "Windows XP Professional x64 Edition SP2 VL EN (MSDN-TechNet)". Programmer Stuffs. March 23, 2011. from the original on July 14, 2014. Retrieved May 2, 2012.
  11. ^ "Microsoft Windows XP 64-Bit Edition". Microsoft TechNet. Microsoft. August 15, 2001. from the original on April 19, 2012. Retrieved May 2, 2012.

Physical memory limits

The maximum amount of RAM that Windows XP can support varies depending on the product edition and the processor architecture. All 32-bit editions of XP support up to 4 GB, except the Windows XP Starter edition, which supports up to 512 MB of RAM.[107] 64-bit editions support up to 128 GB.[108]

Processor limits

Windows XP Professional supports up to two physical processors;[109] Windows XP Home Edition supports only one.[110]

However, XP supports a greater number of logical processors: 32-bit editions support up to 32 logical processors,[111] and 64-bit editions support up to 64 logical processors.[112]

Upgradeability

Several Windows XP components are upgradable to the latest versions, which include new versions introduced in later versions of Windows, and other major Microsoft applications are available. These latest versions for Windows XP include:

Support lifecycle

Support status summary
Expiration date
Mainstream supportApril 14, 2009 (2009-04-14)[4]
Extended supportApril 8, 2014 (2014-04-08)[4]
The official exceptions ended in April 2019.
Applicable XP editions:
Home Edition, Professional Edition, Professional x64 Edition, Professional for Embedded Systems, Media Center Editions (all), Starter Edition, Tablet PC Edition and Tablet PC Edition 2005,[4] as well as Windows Fundamentals for Legacy PCs.[113]
Exceptions
Windows XP 64-Bit Edition (Itanium edition, including Version 2003)Unsupported as of June 30, 2005[5]
Windows XP EmbeddedMainstream support ended on January 11, 2011[4]
Extended support ended on January 12, 2016[4]
Windows Embedded for Point of ServiceMainstream support ended on April 12, 2011[6]
Extended support ended on April 12, 2016[6]
Windows Embedded Standard 2009Mainstream support ended on January 14, 2014
Extended support ended on January 8, 2019[7]
Windows Embedded POSReady 2009Mainstream support ended on April 8, 2014
Extended support ended on April 9, 2019[8]

Support for the original release of Windows XP (without a service pack) ended on August 30, 2005.[4] Both Windows XP Service Pack 1 and 1a were retired on October 10, 2006,[4] and both Windows 2000 and Windows XP SP2 reached their end of support on July 13, 2010, about 24 months after the launch of Windows XP Service Pack 3.[4] The company stopped general licensing of Windows XP to OEMs and terminated retail sales of the operating system on June 30, 2008, 17 months after the release of Windows Vista.[114] However, an exception was announced on April 3, 2008, for OEMs producing what it defined as "ultra low-cost personal computers", particularly netbooks, until one year after the availability of Windows 7 on October 22, 2009. Analysts felt that the move was primarily intended to compete against Linux-based netbooks, although Microsoft's Kevin Hutz stated that the decision was due to apparent market demand for low-end computers with Windows.[115]

Variants of Windows XP for embedded systems have different support policies: Windows XP Embedded SP3 and Windows Embedded for Point of Service SP3 were supported until January and April 2016, respectively. Windows Embedded Standard 2009, which was succeeded by Windows Embedded Standard 7, and Windows Embedded POSReady 2009, which was succeeded by Windows Embedded POSReady 7, were supported until January and April 2019, respectively.[116] These updates, while intended for the embedded editions, could also be downloaded on standard Windows XP with a registry hack, which enabled unofficial patches until April 2019. However, Microsoft advised Windows XP users against installing these fixes, citing incompatibility issues.[9][117]

End of support

On April 14, 2009, Windows XP exited mainstream support and entered the extended support phase; Microsoft continued to provide security updates every month for Windows XP, however, free technical support, warranty claims, and design changes were no longer being offered. Extended support ended on April 8, 2014, over 12 years after the release of Windows XP; normally Microsoft products have a support life cycle of only 10 years.[118] Beyond the final security updates released on April 8, no more security patches or support information are provided for XP free-of-charge; "critical patches" will still be created, and made available only to customers subscribing to a paid "Custom Support" plan.[119] As it is a Windows component, all versions of Internet Explorer for Windows XP also became unsupported.[120]

In January 2014, it was estimated that more than 95% of the 3 million automated teller machines in the world were still running Windows XP (which largely replaced IBM's OS/2 as the predominant operating system on ATMs); ATMs have an average lifecycle of between seven and ten years, but some have had lifecycles as long as 15. Plans were being made by several ATM vendors and their customers to migrate to Windows 7-based systems over the course of 2014, while vendors have also considered the possibility of using Linux-based platforms in the future to give them more flexibility for support lifecycles, and the ATM Industry Association (ATMIA) has since endorsed Windows 10 as a further replacement.[121] However, ATMs typically run the embedded variant of Windows XP, which was supported through January 2016.[122] As of May 2017, around 60% of the 220,000 ATMs in India still run Windows XP.[123]

Furthermore, at least 49% of all computers in China still ran XP at the beginning of 2014. These holdouts were influenced by several factors; prices of genuine copies of later versions of Windows in the country are high, while Ni Guangnan of the Chinese Academy of Sciences warned that Windows 8 could allegedly expose users to surveillance by the United States government,[124] and the Chinese government banned the purchase of Windows 8 products for government use in May 2014 in protest of Microsoft's inability to provide "guaranteed" support.[125] The government also had concerns that the impending end of support could affect their anti-piracy initiatives with Microsoft, as users would simply pirate newer versions rather than purchasing them legally. As such, government officials formally requested that Microsoft extend the support period for XP for these reasons. While Microsoft did not comply with their requests, a number of major Chinese software developers, such as Lenovo, Kingsoft and Tencent, will provide free support and resources for Chinese users migrating from XP.[126] Several governments, in particular those of the Netherlands and the United Kingdom, elected to negotiate "Custom Support" plans with Microsoft for their continued, internal use of Windows XP; the British government's deal lasted for a year, and also covered support for Office 2003 (which reached end-of-life the same day) and cost £5.5 million.[127]

On March 8, 2014, Microsoft deployed an update for XP that, on the 8th of each month, displays a pop-up notification to remind users about the end of support; however, these notifications may be disabled by the user.[128] Microsoft also partnered with Laplink to provide a special "express" version of its PCmover software to help users migrate files and settings from XP to a computer with a newer version of Windows.[129]

 
An electroencephalograph running on Windows XP. The medical industry's continued use of Windows XP is partly due to medical applications being incompatible with later versions of Windows.

Despite the approaching end of support, there were still notable holdouts that had not migrated past XP; many users elected to remain on XP because of the poor reception of Windows Vista, sales of newer PCs with newer versions of Windows declined because of the Great Recession and the effects of Vista, and deployments of new versions of Windows in enterprise environments require a large amount of planning, which includes testing applications for compatibility (especially those that are dependent on Internet Explorer 6, which is not compatible with newer versions of Windows).[130] Major security software vendors (including Microsoft itself) planned to continue offering support and definitions for Windows XP past the end of support to varying extents, along with the developers of Google Chrome, Mozilla Firefox, and Opera web browsers;[120] despite these measures, critics similarly argued that users should eventually migrate from XP to a supported platform.[131] The United States' Computer Emergency Readiness Team released an alert in March 2014 advising users of the impending end of support, and informing them that using XP after April 8 may prevent them from meeting US government information security requirements.[132] Microsoft continued to provide Security Essentials virus definitions and updates for its Malicious Software Removal Tool (MSRT) for XP until July 14, 2015.[133] As the end of extended support approached, Microsoft began to increasingly urge XP customers to migrate to newer versions such as Windows 7 or 8 in the interest of security, suggesting that attackers could reverse engineer security patches for newer versions of Windows and use them to target equivalent vulnerabilities in XP.[134] Windows XP is remotely exploitable by numerous security holes that were discovered after Microsoft stopped supporting it.[135][136]

Similarly, specialized devices that run XP, particularly medical devices, must have any revisions to their software—even security updates for the underlying operating system—approved by relevant regulators before they can be released. For this reason, manufacturers often did not allow any updates to devices' operating systems, leaving them open to security exploits and malware.[137]

Despite the end of support for Windows XP, Microsoft has released three emergency security updates for the operating system to patch major security vulnerabilities:

Researchers reported in August 2019 that Windows 10 users may be at risk for "critical" system compromise because of design flaws of hardware device drivers from multiple providers.[142] In the same month, computer experts reported that the BlueKeep security vulnerability, CVE-2019-0708, that potentially affects older unpatched Microsoft Windows versions via the program's Remote Desktop Protocol, allowing for the possibility of remote code execution, may now include related flaws, collectively named DejaBlue, affecting newer Windows versions (i.e., Windows 7 and all recent versions) as well.[143] In addition, experts reported a Microsoft security vulnerability, CVE-2019-1162, based on legacy code involving Microsoft CTF and ctfmon (ctfmon.exe), that affects all Windows versions from the older Windows XP version to the most recent Windows 10 versions; a patch to correct the flaw is currently available.[144]

Microsoft announced in July 2019 that the Microsoft Internet Games services on Windows XP and Windows Me would end on July 31, 2019 (and for Windows 7 on January 22, 2020).[145] Others, such as Steam, had done the same, ending support for Windows XP and Windows Vista in January 2019.[146]

In 2020, Microsoft announced that it would disable the Windows Update service for SHA-1 endpoints; since Windows XP did not get an update for SHA-2, Windows Update Services are no longer available on the OS as of late July 2020.[147] However, as of October 2021, the old updates for Windows XP are still available on the Microsoft Update Catalog,[148] or through Legacy Update, a community-driven third party replacement for the Windows XP update servers.


Reception

On release, Windows XP received critical acclaim. CNET described the operating system as being "worth the hype", considering the new interface to be "spiffier" and more intuitive than previous versions, but feeling that it may "annoy" experienced users with its "hand-holding". XP's expanded multimedia support and CD burning functionality were also noted, along with its streamlined networking tools. The performance improvements of XP in comparison to 2000 and Me were also praised, along with its increased number of built-in device drivers in comparison to 2000. The software compatibility tools were also praised, although it was noted that some programs, particularly older MS-DOS software, may not work correctly on XP because of its differing architecture. They panned Windows XP's new licensing model and product activation system, considering it to be a "slightly annoying roadblock", but acknowledged Microsoft's intent for the changes.[149] PC Magazine provided similar praise, although noting that a number of its online features were designed to promote Microsoft-owned services, and that aside from quicker boot times, XP's overall performance showed little difference over Windows 2000.[150] Windows XP's default theme, Luna, was criticized by some users for its childish look.[151][152]

Despite extended support for Windows XP ending in 2014, many users – including some enterprises – were reluctant to move away from an operating system they viewed as a stable known quantity despite the many security and functionality improvements in subsequent releases of Windows. Windows XP's longevity was viewed as testament to its stability and Microsoft's successful attempts to keep it up to date, but also as an indictment of its direct successor's perceived failings.[153]

Market share

See also: Usage share of operating systems

According to web analytics data generated by Net Applications, Windows XP was the most widely used operating system until August 2012, when Windows 7 overtook it (later overtaken by Windows 10),[154] while StatCounter indicates it happening almost a year earlier.[155] In January 2014, Net Applications reported a market share of 29.23%[156] of "desktop operating systems" for XP (when XP was introduced there was not a separate mobile category to track), while W3Schools reported a share of 11.0%.[157]

As of September 2022, in most regions or continents, Windows XP market share on PCs, as a fraction of the total Windows share, has gone below 1% (0.5% in Africa[158]). XP still has a double-digit market share in a few countries, such as Armenia at over 50%,[159][160][161][162] at 57%, where Windows 7 was highest ranked, and with it being replaced by Windows 10, Windows XP got highest ranked for the longest time, and had over 60% share on some weekends in the summer of 2019.[163][164]

Source code leak

On September 23, 2020, source code for Windows XP with Service Pack 1 and Windows Server 2003 was leaked onto the imageboard 4chan by an unknown user. Anonymous users managed to compile the code, as well as a Twitter user who posted videos of the process on YouTube proving that the code was genuine.[165] The videos were later removed on copyright grounds by Microsoft. The leak was incomplete as it was missing the Winlogon source code and some other components.[166][167] The original leak itself was spread using magnet links and torrent files whose payload originally included Server 2003 and XP source code and which was later updated with additional files, among which were previous leaks of Microsoft products, its patents, media about conspiracy theories on Bill Gates by anti-vaccination movements and an assortment of PDF files on different topics.[168]

Microsoft issued a statement stating that it was investigating the leaks.[167][169][170]

See also

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Further reading

 
Wikimedia Commons has media related to Microsoft Windows XP.

External links

  • Windows XP End of Support
  • Security Update for Windows XP SP3 (KB4012598)

January 04, 2023
windows, major, release, microsoft, windows, operating, system, released, manufacturing, august, 2001, later, retail, october, 2001, direct, upgrade, predecessors, windows, 2000, high, business, users, windows, home, users, available, devices, running, windows. Windows XP is a major release of Microsoft s Windows NT operating system It was released to manufacturing on August 24 2001 and later to retail on October 25 2001 It is a direct upgrade to its predecessors Windows 2000 for high end and business users and Windows Me for home users available for any devices running Windows NT 4 0 Windows 98 Windows 2000 and Windows Me that meet the new Windows XP system requirements Windows XPVersion of the Windows NT operating systemScreenshot of Windows XP running the Luna visual style showing the start menu taskbar and My Computer windowDeveloperMicrosoftSource modelClosed sourceSource available through Shared Source Initiative 1 Released to manufacturingAugust 24 2001 21 years ago 2001 08 24 2 GeneralavailabilityOctober 25 2001 21 years ago 2001 10 25 2 Final releaseService Pack 3 5 1 2600 5512 April 21 2008 14 years ago 2008 04 21 3 Marketing targetConsumer and BusinessUpdate methodWindows Update Windows Server Update Services WSUS System Center Configuration Manager SCCM PlatformsIA 32 x86 64 and ItaniumKernel typeHybrid NT UserlandWindows API NTVDM IA 32 only SFULicenseProprietary commercial softwarePreceded byWindows 2000 1999 Windows Me 2000 Succeeded byWindows Vista 2007 Official websiteWindows XP archived at Wayback Machine Support statusAll editions except Windows XP Embedded Windows XP 64 bit Edition Windows Embedded for Point of Service Windows Embedded Standard 2009 and Windows Embedded POSReady 2009 Mainstream support ended on April 14 2009 4 Extended support ended on April 8 2014 4 Windows XP 64 bit Edition Unsupported as of June 30 2005 5 Windows XP Embedded Mainstream support ended on January 11 2011 4 Extended support ended on January 12 2016 4 Windows Embedded for Point of Service Mainstream support ended on April 12 2011 6 Extended support ended on April 12 2016 6 Windows Embedded Standard 2009 Mainstream support ended on January 14 2014 7 Extended support ended on January 8 2019 7 Windows Embedded POSReady 2009 Mainstream support ended on April 8 2014 8 Extended support ended on April 9 2019 8 Development of Windows XP began in the late 1990s under the codename Neptune built on the Windows NT kernel explicitly intended for mainstream consumer use An updated version of Windows 2000 was also initially planned for the business market However in January 2000 both projects were scrapped in favor of a single OS codenamed Whistler which would serve as a single platform for both consumer and business markets As a result Windows XP is the first consumer edition of Windows not based on the Windows 95 kernel and MS DOS Windows XP removed support for PC 98 i486 and SGI Visual Workstation 320 and 540 and will only run on 32 bit x86 CPUs and devices which use BIOS firmware Upon its release Windows XP received critical acclaim noting increased performance and stability especially compared to Windows Me a more intuitive user interface improved hardware support and expanded multimedia capabilities Windows XP and Windows Server 2003 were succeeded by Windows Vista and Windows Server 2008 released in 2007 and 2008 respectively Mainstream support for Windows XP ended on April 14 2009 and extended support ended on April 8 2014 Windows Embedded POSReady 2009 based on Windows XP Professional received security updates until April 2019 After that unofficial methods were made available to apply the updates to other editions of Windows XP Still Microsoft discouraged this practice citing compatibility issues 9 However over eight years from the end of life date September 2022 the majority of PCs in some countries such as Armenia still appeared to be running on Windows XP 10 As of September 2022 update globally just 0 39 of Windows PCs 11 and 0 1 of all devices across all platforms continue to run Windows XP Contents 1 Development 1 1 Release 2 New and updated features 2 1 User interface 2 2 Infrastructure 2 3 Networking and internet functionality 2 4 Backwards compatibility 2 5 Other features 3 Removed features 4 Editions 5 Service packs 5 1 Service Pack 1 5 2 Service Pack 2 5 3 Service Pack 3 6 System requirements 6 1 Notes 6 2 Physical memory limits 6 3 Processor limits 7 Upgradeability 8 Support lifecycle 8 1 End of support 9 Reception 9 1 Market share 10 Source code leak 11 See also 12 References 13 Further reading 14 External linksDevelopmentMain article Development of Windows XP In the late 1990s initial development of what would become Windows XP was focused on two individual products Odyssey which was reportedly intended to succeed the future Windows 2000 and Neptune which was reportedly a consumer oriented operating system using the Windows NT architecture succeeding the MS DOS based Windows 98 12 However the projects proved to be too ambitious In January 2000 shortly prior to the official release of Windows 2000 technology writer Paul Thurrott reported that Microsoft had shelved both Neptune and Odyssey in favor of a new product codenamed Whistler named after Whistler British Columbia as many Microsoft employees skied at the Whistler Blackcomb ski resort 13 The goal of Whistler was to unify both the consumer and business oriented Windows lines under a single Windows NT platform Thurrott stated that Neptune had become a black hole when all the features that were cut from Windows Me were simply re tagged as Neptune features And since Neptune and Odyssey would be based on the same code base anyway it made sense to combine them into a single project 14 At PDC on July 13 2000 Microsoft announced that Whistler would be released during the second half of 2001 and also unveiled the first preview build 2250 which featured an early implementation of Windows XP s visual styles system and interface changes to Windows Explorer and the Control Panel 15 Microsoft released the first public beta build of Whistler build 2296 on October 31 2000 Subsequent builds gradually introduced features that users of the release version of Windows XP would recognize such as Internet Explorer 6 0 the Microsoft Product Activation system and the Bliss desktop background 16 Whistler was officially unveiled during a media event on February 5 2001 under the name Windows XP where XP stands for eXPerience 17 Release In June 2001 Microsoft indicated that it was planning to spend at least US 1 billion on marketing and promoting Windows XP in conjunction with Intel and other PC makers 18 The theme of the campaign Yes You Can was designed to emphasize the platform s overall capabilities Microsoft had originally planned to use the slogan Prepare to Fly but it was replaced because of sensitivity issues in the wake of the September 11 attacks 19 On August 24 2001 Windows XP build 2600 was released to manufacturing RTM During a ceremonial media event at Microsoft Redmond Campus copies of the RTM build were given to representatives of several major PC manufacturers in briefcases who then flew off on decorated helicopters While PC manufacturers would be able to release devices running XP beginning on September 24 2001 XP was expected to reach general retail availability on October 25 2001 On the same day Microsoft also announced the final retail pricing of XP s two main editions Home as a replacement for Windows Me for home computing and Professional as a replacement for Windows 2000 for high end users 20 New and updated featuresMain article Features new to Windows XP User interface Updated start menu in the Media Center Edition exclusive Royale theme now featuring two columns While retaining some similarities to previous versions Windows XP s interface was overhauled with a new visual appearance with an increased use of alpha compositing effects drop shadows and visual styles which completely changed the appearance of the operating system The number of effects enabled are determined by the operating system based on the computer s processing power and can be enabled or disabled on a case by case basis XP also added ClearType a new subpixel rendering system designed to improve the appearance of fonts on liquid crystal displays 21 A new set of system icons was also introduced 22 The default wallpaper Bliss is a photo of a landscape in the Napa Valley outside Napa California with rolling green hills and a blue sky with stratocumulus and cirrus clouds 23 The Start menu received its first major overhaul in XP switching to a two column layout with the ability to list pin and display frequently used applications recently opened documents and the traditional cascading All Programs menu The taskbar can now group windows opened by a single application into one taskbar button with a popup menu listing the individual windows The notification area also hides inactive icons by default A common tasks list was added and Windows Explorer s sidebar was updated to use a new task based design with lists of common actions the tasks displayed are contextually relevant to the type of content in a folder e g a folder with music displays offers to play all the files in the folder or burn them to a CD 24 The task grouping feature introduced in Windows XP showing both grouped and individual items Fast user switching allows additional users to log into a Windows XP machine without existing users having to close their programs and log out Although only one user at the time can use the console i e monitor keyboard and mouse previous users can resume their session once they regain control of the console 25 Service Pack 2 and Service Pack 3 also introduced new features to Windows XP post release including the Windows Security Center Bluetooth support the executable space protection Windows Firewall and support for SDHC cards that are larger than 4 GB and smaller than 32 GB 26 27 28 29 Infrastructure Windows XP uses prefetching to improve startup and application launch times 30 It also became possible to revert the installation of an updated device driver should the updated driver produce undesirable results 31 A copy protection system known as Windows Product Activation was introduced with Windows XP and its server counterpart Windows Server 2003 All Windows licenses must be tied to a unique ID generated using information from the computer hardware transmitted either via the internet or a telephone hotline If Windows is not activated within 30 days of installation the OS will cease to function until it is activated Windows also periodically verifies the hardware to check for changes If significant hardware changes are detected the activation is voided and Windows must be re activated 32 Networking and internet functionality Windows XP was originally bundled with Internet Explorer 6 Outlook Express 6 Windows Messenger and MSN Explorer New networking features were also added including Internet Connection Firewall Internet Connection Sharing integration with UPnP NAT traversal APIs Quality of Service features IPv6 and Teredo tunneling Background Intelligent Transfer Service extended fax features network bridging peer to peer networking support for most DSL modems IEEE 802 11 Wi Fi connections with auto configuration and roaming TAPI 3 1 and networking over FireWire 33 Remote Assistance and Remote Desktop were also added which allow users to connect to a computer running Windows XP from across a network or the Internet and access their applications files printers and devices or request help 34 Improvements were also made to IntelliMirror features such as Offline Files Roaming user profiles and Folder redirection 35 Backwards compatibility To enable running software that targets or locks out specific versions of Windows Compatibility mode was added The feature allows pretending a selected earlier version of Windows to software starting at Windows 95 36 While this ability was first introduced in Windows 2000 Service Pack 2 it had to be activated through the register server and was only available to administrator users whereas Windows XP has it activated out of the box and also grants it to regular users 37 Other features Improved application compatibility and shims compared to Windows 2000 38 DirectX 8 1 upgradeable to DirectX 9 0c 39 A number of new features in Windows Explorer including task panes thumbnails and the option to view photos as a slideshow 40 Improved imaging features such as Windows Picture and Fax Viewer 41 Faster start up because of improved Prefetch functions logon logoff hibernation and application launch sequences 30 Numerous improvements to increase the system reliability such as improved System Restore 42 Automated System Recovery 43 and driver reliability improvements through Device Driver Rollback 44 Hardware support improvements such as FireWire 800 45 and improvements to multi monitor support under the name DualView 46 Fast user switching 47 The ClearType font rendering mechanism which is designed to improve text readability on liquid crystal display LCD and similar monitors especially laptops 21 Side by side assemblies 48 and registration free COM 49 General improvements to international support such as more locales languages and scripts MUI support in Terminal Services improved Input Method Editors and National Language Support 50 Removed featuresMain article List of features removed in Windows XP Some of the programs and features that were part of the previous versions of Windows did not make it to Windows XP Various MS DOS commands available in its Windows 9x predecessor were removed 51 as were the POSIX and OS 2 subsystems 52 In networking NetBEUI NWLink and NetDDE were deprecated and not installed by default 53 Plug and play incompatible communication devices like modems and network interface cards were no longer supported 54 Service Pack 2 and Service Pack 3 also removed features from Windows XP including support for TCP half open connections 55 and the address bar on the taskbar 56 EditionsMain article Windows XP editions Diagram representing the main editions of Windows XP It is based on the category of the edition grey and codebase black arrow Windows XP was released in two major editions on launch Home Edition and Professional Edition Both editions were made available at retail as pre loaded software on new computers and as boxed copies Boxed copies were sold as Upgrade or Full licenses the Upgrade versions were slightly cheaper but require an existing version of Windows to install The Full version can be installed on systems without an operating system or existing version of Windows 18 The two editions of XP were aimed at different markets Home Edition is explicitly intended for consumer use and disables or removes certain advanced and enterprise oriented features present on Professional such as the ability to join a Windows domain Internet Information Services and Multilingual User Interface Windows 98 or Me can be upgraded to either edition but Windows NT 4 0 and Windows 2000 can only be upgraded to Professional 57 Windows software license agreement for pre loaded licenses allows the software to be returned to the OEM for a refund if the user does not wish to use it 58 Despite the refusal of some manufacturers to honor the entitlement it has been enforced by courts in some countries 59 Two specialized variants of XP were introduced in 2002 for certain types of hardware exclusively through OEM channels as pre loaded software Windows XP Media Center Edition was initially designed for high end home theater PCs with TV tuners marketed under the term Media Center PC offering expanded multimedia functionality an electronic program guide and digital video recorder DVR support through the Windows Media Center application 60 Microsoft also unveiled Windows XP Tablet PC Edition which contains additional pen input features and is optimized for mobile devices meeting its Tablet PC specifications 61 Two different 64 bit editions of XP were made available The first Windows XP 64 Bit Edition was intended for IA 64 Itanium systems as IA 64 usage declined on workstations in favor of AMD s x86 64 architecture the Itanium edition was discontinued in January 2005 62 A new 64 bit edition supporting the x86 64 architecture called Windows XP Professional x64 Edition was released in April of the same year 63 Microsoft also targeted emerging markets with the 2004 introduction of Windows XP Starter Edition a special variant of Home Edition intended for low cost PCs The OS is primarily aimed at first time computer owners containing heavy localization including wallpapers and screen savers incorporating images of local landmarks and a My Support area which contains video tutorials on basic computing tasks It also removes certain complex features and does not allow users to run more than three applications at a time After a pilot program in India and Thailand Starter was released in other emerging markets throughout 2005 64 In 2006 Microsoft also unveiled the FlexGo initiative which would also target emerging markets with subsidized PCs on a pre paid subscription basis 65 As a result of unfair competition lawsuits in Europe and South Korea which both alleged that Microsoft had improperly leveraged its status in the PC market to favor its own bundled software Microsoft was ordered to release special editions of XP in these markets that excluded certain applications In March 2004 after the European Commission fined Microsoft 497 million US 603 million Microsoft was ordered to release N editions of XP that excluded Windows Media Player encouraging users to pick and download their own media player software 66 As it was sold at the same price as the edition with Windows Media Player included certain OEMs such as Dell who offered it for a short period along with Hewlett Packard Lenovo and Fujitsu Siemens chose not to offer it Consumer interest was minuscule with roughly 1 500 units shipped to OEMs and no reported sales to consumers 67 In December 2005 the Korean Fair Trade Commission ordered Microsoft to make available editions of Windows XP and Windows Server 2003 that do not contain Windows Media Player or Windows Messenger 68 The K and KN editions of Windows XP were released in August 2006 and are only available in English and Korean and also contain links to third party instant messenger and media player software 69 Service packsA service pack is a cumulative update package that is a superset of all updates and even service packs that have been released before it 70 Three service packs have been released for Windows XP Service Pack 3 is slightly different in that it needs at least Service Pack 1 to have been installed in order to update a live OS 71 However Service Pack 3 can still be embedded into a Windows installation disc SP1 is not reported as a prerequisite for doing so 72 The unique boot screens from the RTM to Service Pack 1 versions of Windows XP that identified the edition of Windows XP currently running including a green progress bar for Home Edition and a blue progress bar for Professional Embedded Tablet PC Edition and Media Center Edition were removed in Service Pack 2 of Windows XP and was replaced with a generic Windows XP boot screen with a blue progress bar Service Pack 1 Service Pack 1 SP1 for Windows XP was released on September 9 2002 It contained over 300 minor post RTM bug fixes along with all security patches released since the original release of XP SP1 also added USB 2 0 support the Microsoft Java Virtual Machine NET Framework support and support for technologies used by the then upcoming Media Center and Tablet PC editions of XP 73 The most significant change on SP1 was the addition of Set Program Access and Defaults a settings page which allows programs to be set as default for certain types of activities such as media players or web browsers and for access to bundled Microsoft programs such as Internet Explorer or Windows Media Player to be disabled This feature was added to comply with the settlement of United States v Microsoft Corp which required Microsoft to offer the ability for OEMs to bundle third party competitors to software it bundles with Windows such as Internet Explorer and Windows Media Player and give them the same level of prominence as those normally bundled with the OS 74 On February 3 2003 Microsoft released Service Pack 1a SP1a It was the same as SP1 except the Microsoft Java Virtual Machine was excluded 75 Service Pack 2 Windows Security Center window running Windows XP Service Pack 2 showing no virus protection installed Service Pack 2 SP2 for Windows XP Home edition and Professional edition was released on August 25 2004 76 Headline features included WPA encryption compatibility for Wi Fi and usability improvements to the Wi Fi networking user interface 77 partial Bluetooth support 78 and various improvements to security systems Headed by former computer hacker Window Snyder 79 80 the service pack s security improvements codenamed Springboard 81 as these features were intended to underpin additional changes in Longhorn included a major revision to the included firewall renamed Windows Firewall and now enabled by default and an update to Data Execution Prevention which gained hardware support in the NX bit that can stop some forms of buffer overflow attacks Raw socket support is removed which supposedly limits the damage done by zombie machines and the Windows Messenger service which had been abused to cause pop up advertisements to be displayed as system messages without a web browser or any additional software became disabled by default Additionally security related improvements were made to e mail and web browsing Service Pack 2 also added Security Center an interface that provides a general overview of the system s security status including the state of the firewall and automatic updates Third party firewall and antivirus software can also be monitored from Security Center 82 In August 2006 Microsoft released updated installation media for Windows XP and Windows Server 2003 SP2 SP2b in order to incorporate a patch requiring ActiveX controls in Internet Explorer to be manually activated before a user may interact with them This was done so that the browser would not violate a patent owned by Eolas 83 Microsoft has since licensed the patent and released a patch reverting the change in April 2008 84 In September 2007 another minor revision known as SP2c was released for XP Professional extending the number of available product keys for the operating system to support the continued availability of Windows XP Professional through the scheduled system builder channel end of life EOL date of January 31 2009 85 Windows XP Service Pack 2 was later included in Windows Embedded for Point of Service and Windows Fundamentals for Legacy PCs Service Pack 3 The third and final Service Pack SP3 was released through different channels between April 3 and June 2008 86 about a year after the release of Windows Vista and about a year before the release of Windows 7 Service Pack 3 was not available for Windows XP x64 Edition which was based on the Windows Server 2003 kernel and as a result used its service packs 87 rather than the ones for the other editions 88 It began being automatically pushed out to Automatic Updates users on July 10 2008 89 A feature set overview which detailed new features available separately as stand alone updates to Windows XP as well as backported features from Windows Vista was posted by Microsoft 90 A total of 1 174 fixes are included in SP3 91 Service Pack 3 could be installed on systems with Internet Explorer up to and including version 8 Internet Explorer 7 was not included as part of SP3 92 It also did not include Internet Explorer 8 but instead was included in Windows 7 which was released one year after XP SP3 Service Pack 3 included security enhancements over and above those of SP2 including APIs allowing developers to enable Data Execution Prevention for their code independent of system wide compatibility enforcement settings 93 the Security Support Provider Interface 94 improvements to WPA2 security 95 and an updated version of the Microsoft Enhanced Cryptographic Provider Module that is FIPS 140 2 certified 96 In incorporating all previously released updates not included in SP2 Service Pack 3 included many other key features Windows Imaging Component allowed camera vendors to integrate their own proprietary image codecs with the operating system s features such as thumbnails and slideshows 97 In enterprise features Remote Desktop Protocol 6 1 included support for ClearType and 32 bit color depth over RDP 98 while improvements made to Windows Management Instrumentation in Windows Vista to reduce the possibility of corruption of the WMI repository were backported to XP SP3 99 In addition SP3 contains updates to the operating system components of Windows XP Media Center Edition MCE and Windows XP Tablet PC Edition and security updates for NET Framework version 1 0 which is included in these editions However it does not include update rollups for the Windows Media Center application in Windows XP MCE 2005 100 SP3 also omits security updates for Windows Media Player 10 although the player is included in Windows XP MCE 2005 100 The Address Bar DeskBand on the Taskbar is no longer included because of antitrust violation concerns 101 Unofficial SP3 ZIP download packages were released on a now defunct website called The Hotfix from 2005 to 2007 102 103 The owner of the website Ethan C Allen was a former Microsoft employee in Software Quality Assurance and would comb through the Microsoft Knowledge Base articles daily and download new hotfixes Microsoft would put online within the articles The articles would have a kbwinxppresp3fix and or kbwinxpsp3fix tag thus allowing Allen to easily find and determine which fixes were planned for the official SP3 release to come Microsoft publicly stated at the time that the SP3 pack was unofficial and advised users to not install it 104 105 Allen also released a Vista SP1 package in 2007 for which Allen received a cease and desist email from Microsoft 106 Windows XP Service Pack 3 was later included in Windows Embedded Standard 2009 and Windows Embedded POSReady 2009 System requirementsSystem requirements for Windows XP are as follows System requirements Minimum RecommendedHome Professional Edition A CPU Pentium or compatible 233 MHz B C BIOS or compatible firmware D Pentium or compatible 300 MHzBIOS or compatible firmware D Memory 64 MB E F 128 MBFree space 1 5 GBMaster boot record used D 661 MB for Service Pack 1 and 1a G 1 8 GB for Service Pack 2 H 900 MB for Service Pack 3 I Media CD ROM drive or compatibleDisplay Super VGA 800 600 Sound hardware N ASound card plus speakers headphonesInput device s Keyboard mouseProfessional x64 Edition J CPU x86 64 or compatibleBIOS or compatible firmware D Memory 256 MBFree space 1 5 GBMaster boot record used D Media CD ROM drive or compatibleDisplay Super VGA 800 600 Sound hardware N ASound card plus speakers headphonesInput device s Keyboard mouse64 Bit Edition K CPU Itanium 733 MHzItanium 800 MHzMemory 1 GBFree space 6 GBMedia CD ROM drive or compatibleDisplay Super VGA 800 600 Input device s Keyboard mouseNotes System requirements for Windows XP operating systems April 28 2005 Archived from the original on August 6 2011 Retrieved March 12 2007 Even though this is Microsoft s stated minimum processor speed for Windows XP it is possible to install and run the operating system on early IA 32 processors such as a P5 Pentium without MMX instructions Windows XP is not compatible with processors older than Pentium such as 486 or the Cyrix 6x86 because it requires CMPXCHG8B see Pentium F00F bug instructions Windows XP Minimal Requirement Test Winhistory de September 9 2011 Archived from the original on December 21 2011 Retrieved January 1 2012 a b c d e Windows XP Required firmware and partition mapping scheme of hard disk drive Support microsoft com June 26 2013 Archived from the original on April 27 2017 Retrieved June 16 2014 A Microsoft TechNet paper from Summer 2001 before Windows XP s actual release states that A computer with 64 MB of RAM will have sufficient resources to run Windows XP and a few applications with moderate memory requirements Emphasis added These were said to be office productivity applications e mail programs and web browsers of the time With such a configuration user interface enhancements and fast user switching are turned off by default For comparable workloads 64 MB of RAM was then regarded as providing an equal or better user experience on Windows XP with similar settings than it would with Windows Me on the same hardware In a later section of the paper superior performance over Windows Me was noted with 128 MB of RAM or more and with computers that exceed the minimum hardware requirements Sechrest Stuart Fortin Michael June 1 2001 Windows XP Performance Microsoft TechNet Archived from the original on July 27 2010 Retrieved April 8 2008 Hard disk space requirements for Windows XP Service Pack 1 Microsoft October 29 2007 Archived from the original on April 21 2012 Retrieved April 6 2012 The hard disk space requirements for Windows XP Service Pack 2 Microsoft April 18 2005 Archived from the original on November 24 2010 Retrieved December 1 2010 Windows XP End of Support Migration Guide Download TechNet technet microsoft com 2007 Archived from the original on May 13 2008 Windows XP Professional x64 Edition SP2 VL EN MSDN TechNet Programmer Stuffs March 23 2011 Archived from the original on July 14 2014 Retrieved May 2 2012 Microsoft Windows XP 64 Bit Edition Microsoft TechNet Microsoft August 15 2001 Archived from the original on April 19 2012 Retrieved May 2 2012 Physical memory limits The maximum amount of RAM that Windows XP can support varies depending on the product edition and the processor architecture All 32 bit editions of XP support up to 4 GB except the Windows XP Starter edition which supports up to 512 MB of RAM 107 64 bit editions support up to 128 GB 108 Processor limits Windows XP Professional supports up to two physical processors 109 Windows XP Home Edition supports only one 110 However XP supports a greater number of logical processors 32 bit editions support up to 32 logical processors 111 and 64 bit editions support up to 64 logical processors 112 UpgradeabilitySeveral Windows XP components are upgradable to the latest versions which include new versions introduced in later versions of Windows and other major Microsoft applications are available These latest versions for Windows XP include ActiveSync 4 5 DirectX 9 0c June 7 2010 Redistributable Internet Explorer 8 on Windows XP Service Packs 2 and 3 Internet Explorer 6 SP1 and Outlook Express 6 SP1 on Windows XP before SP2 Windows Media Format Runtime and Windows Media Player 11 on Windows XP Service Packs 2 and 3 and Windows Media Player 10 on Windows XP original release Microsoft Virtual PC 2004 and 2007 NET Framework up to and including version 4 0 4 5 and higher versions are not supported Visual Studio 2005 on Windows XP versions below SP2 Visual Studio 2008 on Windows XP SP2 and Visual Studio 2010 on Windows XP SP3 Windows Script Host 5 7 Windows Installer 4 5 Microsoft NetMeeting 3 02 Office 2010 was the last version of Microsoft Office to be compatible with Windows XP The Windows Services for UNIX subsystem can be installed to allow certain Unix based applications to run on the operating system Support lifecycleSupport status summaryExpiration dateMainstream supportApril 14 2009 2009 04 14 4 Extended supportApril 8 2014 2014 04 08 4 The official exceptions ended in April 2019 Applicable XP editions Home Edition Professional Edition Professional x64 Edition Professional for Embedded Systems Media Center Editions all Starter Edition Tablet PC Edition and Tablet PC Edition 2005 4 as well as Windows Fundamentals for Legacy PCs 113 ExceptionsWindows XP 64 Bit Edition Itanium edition including Version 2003 Unsupported as of June 30 2005 5 Windows XP EmbeddedMainstream support ended on January 11 2011 4 Extended support ended on January 12 2016 4 Windows Embedded for Point of ServiceMainstream support ended on April 12 2011 6 Extended support ended on April 12 2016 6 Windows Embedded Standard 2009Mainstream support ended on January 14 2014Extended support ended on January 8 2019 7 Windows Embedded POSReady 2009Mainstream support ended on April 8 2014Extended support ended on April 9 2019 8 Support for the original release of Windows XP without a service pack ended on August 30 2005 4 Both Windows XP Service Pack 1 and 1a were retired on October 10 2006 4 and both Windows 2000 and Windows XP SP2 reached their end of support on July 13 2010 about 24 months after the launch of Windows XP Service Pack 3 4 The company stopped general licensing of Windows XP to OEMs and terminated retail sales of the operating system on June 30 2008 17 months after the release of Windows Vista 114 However an exception was announced on April 3 2008 for OEMs producing what it defined as ultra low cost personal computers particularly netbooks until one year after the availability of Windows 7 on October 22 2009 Analysts felt that the move was primarily intended to compete against Linux based netbooks although Microsoft s Kevin Hutz stated that the decision was due to apparent market demand for low end computers with Windows 115 Variants of Windows XP for embedded systems have different support policies Windows XP Embedded SP3 and Windows Embedded for Point of Service SP3 were supported until January and April 2016 respectively Windows Embedded Standard 2009 which was succeeded by Windows Embedded Standard 7 and Windows Embedded POSReady 2009 which was succeeded by Windows Embedded POSReady 7 were supported until January and April 2019 respectively 116 These updates while intended for the embedded editions could also be downloaded on standard Windows XP with a registry hack which enabled unofficial patches until April 2019 However Microsoft advised Windows XP users against installing these fixes citing incompatibility issues 9 117 End of support On April 14 2009 Windows XP exited mainstream support and entered the extended support phase Microsoft continued to provide security updates every month for Windows XP however free technical support warranty claims and design changes were no longer being offered Extended support ended on April 8 2014 over 12 years after the release of Windows XP normally Microsoft products have a support life cycle of only 10 years 118 Beyond the final security updates released on April 8 no more security patches or support information are provided for XP free of charge critical patches will still be created and made available only to customers subscribing to a paid Custom Support plan 119 As it is a Windows component all versions of Internet Explorer for Windows XP also became unsupported 120 In January 2014 it was estimated that more than 95 of the 3 million automated teller machines in the world were still running Windows XP which largely replaced IBM s OS 2 as the predominant operating system on ATMs ATMs have an average lifecycle of between seven and ten years but some have had lifecycles as long as 15 Plans were being made by several ATM vendors and their customers to migrate to Windows 7 based systems over the course of 2014 while vendors have also considered the possibility of using Linux based platforms in the future to give them more flexibility for support lifecycles and the ATM Industry Association ATMIA has since endorsed Windows 10 as a further replacement 121 However ATMs typically run the embedded variant of Windows XP which was supported through January 2016 122 As of May 2017 around 60 of the 220 000 ATMs in India still run Windows XP 123 Furthermore at least 49 of all computers in China still ran XP at the beginning of 2014 These holdouts were influenced by several factors prices of genuine copies of later versions of Windows in the country are high while Ni Guangnan of the Chinese Academy of Sciences warned that Windows 8 could allegedly expose users to surveillance by the United States government 124 and the Chinese government banned the purchase of Windows 8 products for government use in May 2014 in protest of Microsoft s inability to provide guaranteed support 125 The government also had concerns that the impending end of support could affect their anti piracy initiatives with Microsoft as users would simply pirate newer versions rather than purchasing them legally As such government officials formally requested that Microsoft extend the support period for XP for these reasons While Microsoft did not comply with their requests a number of major Chinese software developers such as Lenovo Kingsoft and Tencent will provide free support and resources for Chinese users migrating from XP 126 Several governments in particular those of the Netherlands and the United Kingdom elected to negotiate Custom Support plans with Microsoft for their continued internal use of Windows XP the British government s deal lasted for a year and also covered support for Office 2003 which reached end of life the same day and cost 5 5 million 127 On March 8 2014 Microsoft deployed an update for XP that on the 8th of each month displays a pop up notification to remind users about the end of support however these notifications may be disabled by the user 128 Microsoft also partnered with Laplink to provide a special express version of its PCmover software to help users migrate files and settings from XP to a computer with a newer version of Windows 129 An electroencephalograph running on Windows XP The medical industry s continued use of Windows XP is partly due to medical applications being incompatible with later versions of Windows Despite the approaching end of support there were still notable holdouts that had not migrated past XP many users elected to remain on XP because of the poor reception of Windows Vista sales of newer PCs with newer versions of Windows declined because of the Great Recession and the effects of Vista and deployments of new versions of Windows in enterprise environments require a large amount of planning which includes testing applications for compatibility especially those that are dependent on Internet Explorer 6 which is not compatible with newer versions of Windows 130 Major security software vendors including Microsoft itself planned to continue offering support and definitions for Windows XP past the end of support to varying extents along with the developers of Google Chrome Mozilla Firefox and Opera web browsers 120 despite these measures critics similarly argued that users should eventually migrate from XP to a supported platform 131 The United States Computer Emergency Readiness Team released an alert in March 2014 advising users of the impending end of support and informing them that using XP after April 8 may prevent them from meeting US government information security requirements 132 Microsoft continued to provide Security Essentials virus definitions and updates for its Malicious Software Removal Tool MSRT for XP until July 14 2015 133 As the end of extended support approached Microsoft began to increasingly urge XP customers to migrate to newer versions such as Windows 7 or 8 in the interest of security suggesting that attackers could reverse engineer security patches for newer versions of Windows and use them to target equivalent vulnerabilities in XP 134 Windows XP is remotely exploitable by numerous security holes that were discovered after Microsoft stopped supporting it 135 136 Similarly specialized devices that run XP particularly medical devices must have any revisions to their software even security updates for the underlying operating system approved by relevant regulators before they can be released For this reason manufacturers often did not allow any updates to devices operating systems leaving them open to security exploits and malware 137 Despite the end of support for Windows XP Microsoft has released three emergency security updates for the operating system to patch major security vulnerabilities A patch released in May 2014 to address recently discovered vulnerabilities in Internet Explorer 6 through 11 on all versions of Windows 138 A patch released in May 2017 to address a vulnerability that was being leveraged by the WannaCry ransomware attack 139 A patch released in May 2019 to address a critical code execution vulnerability in Remote Desktop Services which can be exploited in a similar way as the WannaCry vulnerability 140 141 Researchers reported in August 2019 that Windows 10 users may be at risk for critical system compromise because of design flaws of hardware device drivers from multiple providers 142 In the same month computer experts reported that the BlueKeep security vulnerability CVE 2019 0708 that potentially affects older unpatched Microsoft Windows versions via the program s Remote Desktop Protocol allowing for the possibility of remote code execution may now include related flaws collectively named DejaBlue affecting newer Windows versions i e Windows 7 and all recent versions as well 143 In addition experts reported a Microsoft security vulnerability CVE 2019 1162 based on legacy code involving Microsoft CTF and ctfmon ctfmon exe that affects all Windows versions from the older Windows XP version to the most recent Windows 10 versions a patch to correct the flaw is currently available 144 Microsoft announced in July 2019 that the Microsoft Internet Games services on Windows XP and Windows Me would end on July 31 2019 and for Windows 7 on January 22 2020 145 Others such as Steam had done the same ending support for Windows XP and Windows Vista in January 2019 146 In 2020 Microsoft announced that it would disable the Windows Update service for SHA 1 endpoints since Windows XP did not get an update for SHA 2 Windows Update Services are no longer available on the OS as of late July 2020 147 However as of October 2021 the old updates for Windows XP are still available on the Microsoft Update Catalog 148 or through Legacy Update a community driven third party replacement for the Windows XP update servers ReceptionOn release Windows XP received critical acclaim CNET described the operating system as being worth the hype considering the new interface to be spiffier and more intuitive than previous versions but feeling that it may annoy experienced users with its hand holding XP s expanded multimedia support and CD burning functionality were also noted along with its streamlined networking tools The performance improvements of XP in comparison to 2000 and Me were also praised along with its increased number of built in device drivers in comparison to 2000 The software compatibility tools were also praised although it was noted that some programs particularly older MS DOS software may not work correctly on XP because of its differing architecture They panned Windows XP s new licensing model and product activation system considering it to be a slightly annoying roadblock but acknowledged Microsoft s intent for the changes 149 PC Magazine provided similar praise although noting that a number of its online features were designed to promote Microsoft owned services and that aside from quicker boot times XP s overall performance showed little difference over Windows 2000 150 Windows XP s default theme Luna was criticized by some users for its childish look 151 152 Despite extended support for Windows XP ending in 2014 many users including some enterprises were reluctant to move away from an operating system they viewed as a stable known quantity despite the many security and functionality improvements in subsequent releases of Windows Windows XP s longevity was viewed as testament to its stability and Microsoft s successful attempts to keep it up to date but also as an indictment of its direct successor s perceived failings 153 Market share See also Usage share of operating systems According to web analytics data generated by Net Applications Windows XP was the most widely used operating system until August 2012 when Windows 7 overtook it later overtaken by Windows 10 154 while StatCounter indicates it happening almost a year earlier 155 In January 2014 Net Applications reported a market share of 29 23 156 of desktop operating systems for XP when XP was introduced there was not a separate mobile category to track while W3Schools reported a share of 11 0 157 As of September 2022 update in most regions or continents Windows XP market share on PCs as a fraction of the total Windows share has gone below 1 0 5 in Africa 158 XP still has a double digit market share in a few countries such as Armenia at over 50 159 160 161 162 at 57 where Windows 7 was highest ranked and with it being replaced by Windows 10 Windows XP got highest ranked for the longest time and had over 60 share on some weekends in the summer of 2019 163 164 Source code leakOn September 23 2020 source code for Windows XP with Service Pack 1 and Windows Server 2003 was leaked onto the imageboard 4chan by an unknown user Anonymous users managed to compile the code as well as a Twitter user who posted videos of the process on YouTube proving that the code was genuine 165 The videos were later removed on copyright grounds by Microsoft The leak was incomplete as it was missing the Winlogon source code and some other components 166 167 The original leak itself was spread using magnet links and torrent files whose payload originally included Server 2003 and XP source code and which was later updated with additional files among which were previous leaks of Microsoft products its patents media about conspiracy theories on Bill Gates by anti vaccination movements and an assortment of PDF files on different topics 168 Microsoft issued a statement stating that it was investigating the leaks 167 169 170 See 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