Windows build versions numbers

Personal computer versions

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High-performance computing (HPC) servers

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Windows Essential Business Server

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Windows Home Server

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Windows MultiPoint Server

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Windows Small Business Server

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Mixed reality and virtual reality headsets

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Windows XP-based tablets

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Windows Embedded Compact

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Windows Embedded Standard

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Other embedded versions

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Cancelled personal computer versions

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Cancelled mobile versions

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Cancelled server versions

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1. ^ Originally codenamed Winball
2. ^ Has also been called ChiCairo and London.^[2]
3. ^ ^{a b} Windows Vista and Windows Server 2008 originally had the build number 6000 when they were first released; the build number was increased by one with each of the two subsequent Service Packs.
4. ^ ^{a b} Windows 7 and Windows Server 2008 R2 originally had the build number 7600 when they were first released; the build number was increased to 7601 with the release of Service Pack 1.
5. ^ Announcement date
6. ^ Retroactively referred to as Threshold 1
7. ^ The core of Windows 11 version 21H2 is codenamed Cobalt;^[7] the «Sun Valley» codename refers to the UI layer of Windows 11 version 21H2 and is commonly used to address Windows 11 version 21H2 as a whole.
8. ^ ^{a b c d} The end-of-support date listed in the table refers to Home and Pro editions. Specific versions and editions of Windows 11 have different end of support dates; see template:Windows 11 versions for a breakdown of dates by version and edition.
9. ^ The core of Windows 11 version 22h2 is codenamed Nickel; the «Sun Valley 2» codename refers to the UI layer of Windows 11 version 22H2.
10. ^ Originally named «Windows Phone 7 Series»
11. ^ Between versions 1709 and 20H2 of Windows Server, the «Windows Server Essentials» edition of Windows Server was only included in Windows Server 2019.
12. ^ Nashville was originally codenamed Cleveland.
13. ^ July 2007 is when it was reported that the Vista’s successor was codenamed «7», rather than «Vienna», indicating that Vienna’s discontinuation had occurred by then. However, Vienna may have been cancelled prior to then.
14. ^ While Santorini was the general codename for Windows 10X, Centaurus was the specific codename for Windows 10X on foldable PCs and Pegasus was the codename for Windows 10X on «traditional» PCs (such as laptops or 2-in-1 computers).^[24]
15. ^ ^{a b} Date refers to when the cancellation of the operating system was announced. The decision for the operating system to be cancelled may have occurred prior to then.

1. ^ «Random internal Windows terminology:IDW, Razzle, and their forgotten partners IDS and Dazzle». The Old New Thing. 2018-12-24. Retrieved 2020-04-09.
2. ^ «Systems Release Strategy — Draft:10/10/93» (PDF). Slated Antitrust. November 10, 1993. Archived from the original (PDF) on January 17, 2023. Retrieved July 19, 2021.
3. ^ Martens, China (July 22, 2005). «Update:Microsoft’s Longhorn becomes Windows Vista». IDG Communications, Inc. Retrieved 13 June 2021. Microsoft Corp. has announced the official name for its upcoming operating system, previously known under the code name Longhorn. The operating system, now due out in 2006, will be called Windows Vista
4. ^ «What was the code name for Windows 7?». The Old New Thing. 2019-07-22. Retrieved 2021-05-09. The code name for Windows 7 was… Windows 7.
5. ^ O’Brien, Terrence (19 July 2019). «Microsoft drops the Blue codename, confirms Windows 8.1 will be a free upgrade available later this year». Engadget. Retrieved 30 April 2023. One of the worst kept secrets rattling around Microsoft’s campus is Windows Blue, the forthcoming update to Windows 8 that addresses users’ bugbears about the OS. Now, Microsoft is officially rechristening the platform, and with a more staid name: Windows 8.1.
6. ^ Foley, Mary Jo. «Microsoft to share Windows Threshold plans at Build 2014 show: Report». ZDNet. Retrieved 7 April 2022.
7. ^ Parmar, Mayank (3 September 2021). «Windows 11 Build 22449 is now available with new loading animation». Windows Latest. Retrieved 4 September 2021. Windows 11 version 21H2 (shipping on October 5)=Cobalt (Co).
8. ^ Foley, Mary Jo. «Microsoft starts rolling out IE 6 for Windows Mobile». ZDNET. Retrieved 23 September 2022. The new IE 6 bits were released on November 11 as part of the Windows Mobile 6.1.4 release from Microsoft’s Download Center Web site.
9. ^ Woods, Rich. «It’s finally dead: Windows 10 Mobile is no longer supported after today». Neowin. Neowin LLC. Retrieved 23 December 2021. Windows 10 feature2 ended up being version 1709, and it was the final feature update for Windows 10 Mobile.
10. ^ ^{a b c d e f g h i j} Gerend, Jason. «Windows Server release information». docs.microsoft.com. Archived from the original on 2017-11-18. Retrieved 2020-09-09.
11. ^ «What’s New in Windows Server version 1709». Microsoft Docs. Microsoft. Retrieved 2 January 2022.
12. ^ «Windows Server, version 1803 end of servicing on November 12, 2019». Microsoft Docs. Microsoft. Retrieved 2 January 2022.
13. ^ Woods, Rich. «Microsoft re-releases Windows Server 2019 and Windows Server, version 1809». Neowin. Neowin LLC. Retrieved 2 January 2022.
14. ^ ^{a b} Gerend, Jason. «Windows Server servicing channels». docs.microsoft.com. Retrieved 2020-09-09.
15. ^ Sharma, Mayank (20 August 2021). «Microsoft has snuck out its Windows Server 2022 release». TechRadar. Future US, Inc. Retrieved 3 January 2022.
16. ^ Foley, Mary Jo. «Microsoft ups allowable Windows 10 Mobile screen size to nearly nine inches». ZDNET. Retrieved 11 September 2022.
17. ^ ^{a b c} «HoloLens 1st (gen) release notes». Retrieved 18 July 2021.
18. ^ ^{a b c d e f} «HoloLens 2 release notes». Retrieved 18 July 2021.
19. ^ ^{a b c d} «Surface Hub update history». Retrieved 18 July 2021.
20. ^ Bill Gates (1994-11-14). «Information At Your Fingertips, 1994 Comdex Keynote». Archived from the original on 2007-11-10. Retrieved 2008-01-02.
21. ^ «Microsoft combines Neptune, Odyssey into Whistler». CNN. January 27, 2000. Archived from the original on September 1, 2008. Retrieved January 6, 2010.
22. ^ Christian, Zachary. «Windows guides». Retrieved 25 September 2023.
23. ^ «Windows Odyssey». Retrieved 16 July 2021. Knowing that Neptune is 5.50, it’s only logical to conclude Odyssey was to be 6.0
24. ^ Bowden, Zac (October 30, 2019). «Windows Core OS:The complete guide». Windows Central. Future US, Inc. Retrieved 14 June 2021.
25. ^ Warren, Tom (May 18, 2021). «Microsoft confirms Windows 10X is dead». The Verge. Vox Media, LLC. Retrieved 14 June 2021.
26. ^ Sams, Brad (December 3, 2018). «What is Windows Lite? It’s Microsoft’s Chrome OS Killer». Petri. BWW Media Group. Retrieved 16 July 2021.
27. ^ Bowden, Zac (May 4, 2020). «Windows 10X will now launch first on single-screen PCs». Windows Central. Future US, Inc. Retrieved 16 July 2021.
28. ^ Litvinenko, Yuri (21 May 2019). «Microsoft’s Project Photon:A Stunted Effort to Rebuild Windows Mobile». Retrieved 16 July 2021. Checking reports against each other provides the grounds to assume Microsoft kept working on Photon till September 2008.
29. ^ «Windows Mobile 7 vs Windows Phone 7». Popular Pages at brighthub.com. May 20, 2011. Retrieved December 15, 2016.
30. ^ «Revealed:Original Windows Mobile 7 UI». neowin.net. February 20, 2010. Retrieved December 15, 2016.
31. ^ Bowden, Zac (September 18, 2020). «Project Andromeda:The secret history of Windows on Surface Duo». Windows Central. Future US, Inc. Retrieved 16 July 2021. Microsoft had originally planned to ship CShell on Windows 10 Mobile under the codename Pheonix [sic], but that plan very quickly went away once the company decided to wind down its existing phone efforts in early 2017.
32. ^ Bowden, Zac (September 18, 2020). «Project Andromeda:The secret history of Windows on Surface Duo». Windows Central. Future US, Inc. Retrieved 16 July 2021.