List of Microsoft Windows versions

Original Windows logo from 1985

Current Windows logo (introduced in 2021)

Timeline showing releases of Windows for personal computers and servers

Microsoft Windows is a computer operating system developed by Microsoft. It was first launched in 1985 as a graphical operating system built on MS-DOS. The initial version was followed by several subsequent releases, and by the early 1990s, the Windows line had split into two separate lines of releases: Windows 9x for consumers and Windows NT for businesses and enterprises. In the following years, several further variants of Windows would be released: Windows CE in 1996 for embedded systems; Pocket PC in 2000 (renamed to Windows Mobile in 2003 and Windows Phone in 2010) for personal digital assistants and, later, smartphones; Windows Holographic in 2016 for AR/VR headsets; and several other editions.

Personal computer versions

A "personal computer" version of Windows is considered to be a version that end-users or OEMs can install on personal computers, including desktop computers, laptops, and workstations.

The first five versions of Windows–Windows 1.0, Windows 2.0, Windows 2.1, Windows 3.0, and Windows 3.1–were all based on MS-DOS, and were aimed at both consumers and businesses. However, Windows 3.1 had two separate successors, splitting the Windows line in two: the consumer-focused "Windows 9x" line, consisting of Windows 95, Windows 98, and Windows Me; and the professional Windows NT line, comprising Windows NT 3.1, Windows NT 3.5, Windows NT 3.51, Windows NT 4.0, and Windows 2000. These two lines were reunited into a single line with the NT-based Windows XP; this Windows release succeeded both Windows Me and Windows 2000 and had separate editions for consumer and professional use. Since Windows XP, multiple further versions of Windows have been released, the most recent of which is Windows 11.

Name	Codename	Release date	Version	Editions	Build number	Architecture	End of support
Windows 1.01	Interface Manager	1985-11-20	1.01	—	—	x86-16	2001-12-31
Windows 1.02	—	1986-05-14	1.02	—	—
Windows 1.03	—	1986-08-21	1.03	—	—
Windows 1.04	—	1987-04-10	1.04	—	—
Windows 2.01	—	1987-12-09	2.01	—	—	x86-16, IA-32
Windows 2.03	—	1987-12-09	2.03	—	—
Windows 2.1	—	1988-05-27	2.10	—	—
Windows 2.11	—	1989-03-13	2.11	—	—
Windows 3.0	—	1990-05-22	3.00	Windows 3.00a Windows 3.0 with Multimedia Extensions	—
Windows 3.1	—	1992-04-06	3.10	Windows 3.1	103
Windows 3.1	Sparta	1992-10	3.10	Windows for Workgroups 3.1	102	IA-32
Windows NT 3.1	Razzle	1993-07-27	NT 3.1	Windows NT 3.1	528	IA-32, Alpha, MIPS	2000-12-31
Windows 3.11	—	1993-11-08	3.11	Windows 3.11	?	x86-16, IA-32	2001-12-31
Windows 3.11	Snowball	1993-11-08	3.11	Windows for Workgroups 3.11	300	IA-32
Windows 3.2	—	1993-11-22	3.2	Windows 3.2	153	x86-16, IA-32
Windows NT 3.5	Daytona	1994-09-21	NT 3.5	Windows NT 3.5 Workstation	807	IA-32, Alpha, MIPS, PowerPC
Windows NT 3.51	Daytona	1995-05-30	NT 3.51	Windows NT 3.51 Workstation	1057	IA-32, Alpha, MIPS, PowerPC
Windows 95	Chicago	1995-08-24	4.00	Windows 95	950	IA-32
Windows NT 4.0	Shell Update Release	1996-08-24	NT 4.0	Windows NT 4.0 Workstation	1381	IA-32, Alpha, MIPS, PowerPC	2004-06-30
Windows 98	Memphis	1998-06-25	4.10	Windows 98	1998	IA-32	2006-07-11
Windows 98 Second Edition	—	1999-05-05	4.10	Windows 98 Second Edition	2222A	IA-32	2006-07-11
Windows 2000	Windows NT 5.0	2000-02-17	NT 5.0	Windows 2000 Professional	2195	IA-32	2010-07-13
Windows Me	Millennium	2000-09-14	4.90	Windows Me	3000	IA-32	2006-07-11
Windows XP	Whistler	2001-10-25	NT 5.1	Windows XP Starter Windows XP Home Windows XP Professional	2600	IA-32	2014-04-08
	Whistler	2001-10-25		Windows XP 64-bit Edition		Itanium
	Freestyle	2002-10-29		Windows XP Media Center Edition		IA-32
	Harmony	2003-09-30		Windows XP Media Center Edition 2004
	Symphony	2004-10-12		Windows XP Media Center Edition 2005	2700
	Emerald	2005-10-14		Windows XP Media Center Edition 2005 Update Rollup 2	2710
	Anvil	2005-04-25	NT 5.2	Windows XP Professional x64 Edition	3790	x86-64
Windows Vista	Longhorn	2007-01-30	NT 6.0	Windows Vista Starter Windows Vista Home Basic Windows Vista Home Premium Windows Vista Business Windows Vista Enterprise Windows Vista Ultimate	6002	IA-32, x86-64	2017-04-11
Windows 7	Windows 7	2009-10-22	NT 6.1	Windows 7 Starter Windows 7 Home Basic Windows 7 Home Premium Windows 7 Professional Windows 7 Enterprise Windows 7 Ultimate	7601	IA-32, x86-64	2020-01-14
Windows 8	Windows 8	2012-10-26	NT 6.2	Windows 8 Windows 8 Pro Windows 8 Enterprise	9200	IA-32, x86-64	2016-01-12
Windows 8.1	Blue	2013-10-17	NT 6.3	Windows 8.1 Windows 8.1 Pro Windows 8.1 Enterprise	9600	IA-32, x86-64	2023-01-10
Windows 8.1	Blue	2014-05-23	NT 6.3	Windows 8.1 with Bing	9600	IA-32, x86-64	2023-01-10
Windows 10 version 1507	Threshold	2015-07-29	NT 10.0	Windows 10 Home Windows 10 Pro Windows 10 Education Windows 10 Enterprise Windows 10 Pro for Workstations Windows 10 Pro Education Windows 10 S Windows 10 Enterprise LTSC	10240	IA-32, x86-64	2025-10-14
Windows 10 version 1511	Threshold 2	2015-11-10	1511		10586
Windows 10 version 1607	Redstone 1	2016-08-02	1607		14393
Windows 10 version 1703	Redstone 2	2017-04-05	1703		15063
Windows 10 version 1709	Redstone 3	2017-10-17	1709		16299	IA-32, x86-64, ARM64
Windows 10 version 1803	Redstone 4	2018-04-30	1803		17134
Windows 10 version 1809	Redstone 5	2018-11-13	1809		17763
Windows 10 version 1903	19H1	2019-05-21	1903		18362
Windows 10 version 1909	Vanadium	2019-11-12	1909		18363
Windows 10 version 2004	Vibranium	2020-05-27	2004		19041
Windows 10 version 20H2		2020-10-20	20H2		19042
Windows 10 version 21H1		2021-05-18	21H1		19043
Windows 10 version 21H2		2021-11-16	21H2		19044
Windows 10 version 22H2		2022-10-18	22H2		19045
Windows 11 version 21H2	Sun Valley	2021-10-05	21H2	Windows 11 Home Windows 11 Pro Windows 11 Pro for Workstations Windows 11 Pro Education Windows 11 Education Windows 11 Enterprise Windows 11 SE	22000	x86-64, ARM64	2023-10-10
Windows 11 version 22H2	Sun Valley 2	2022-09-20	22H2		22621	x86-64, ARM64	2024-10-14

Mobile versions

Mobile versions refer to versions of Windows that can run on smartphones or personal digital assistants.

Pocket PC 2000 logo

Windows Phone 7 logo

Windows Phone 8 logo

Windows Phone 8.1 logo

Logo used for Windows 10 and Windows 10 Mobile

Name	Codename	Architecture	Release date	Version Number
Pocket PC 2000	Rapier	ARMv4, MIPS, SH-3	2000-04-19	CE 3.0
Pocket PC 2002	Merlin	ARMv4	2001-10-04	CE 3.0
Windows Mobile 2003	Ozone	ARMv5	2003-06-23	CE 4.x
Windows Mobile 2003 SE	—		2004-03-24	CE 4.x
Windows Mobile 5.0	Magneto		2005-05-09	CE 5.0
Windows Mobile 6.0	Crossbow		2007-02-12	CE 5.0
Windows Mobile 6.1	—		2008-04-01	CE 5.2
Windows Mobile 6.1.4	6 on 6		2008-11-11	CE 5.2
Windows Mobile 6.5	Titanium		2009-05-11	CE 6.0
Windows Phone 7	—	ARMv7	2010-10-29
Windows Phone 7.5	Mango		2011-09-27
Windows Phone 7.8	—		2013-02-01
Windows Phone 8	Apollo		2012-10-29	NT 6.2
Windows Phone 8.1	Blue		2014-04-14	NT 6.3
Windows 10 Mobile, version 1511	Threshold 2		2015-11-12	1511
Windows 10 Mobile, version 1607	Redstone 1		2016-08-16	1607
Windows 10 Mobile, version 1703	Redstone 2		2017-04-24	1703
Windows 10 Mobile, version 1709	feature2		2017-10-24	1709

Server versions

Name	Codename	Release date	Version number	Editions	Build number	Architecture	End of support
Windows NT 3.1	Razzle	1993-07-27	NT 3.1	Windows NT 3.1 Advanced Server	528	IA-32, Alpha, MIPS	2000-12-31
Windows NT 3.5	Daytona	1994-09-20	NT 3.5	Windows NT 3.5 Server	807	IA-32, Alpha, MIPS, PowerPC	2001-12-31
Windows NT 3.51	Daytona	1995-05-29	NT 3.51	Windows NT 3.51 Server	1057		2001-12-31
Windows NT 4.0	Shell Update Release	1996-07-29	NT 4.0	Windows NT 4.0 Server Windows NT 4.0 Server Enterprise Windows NT 4.0 Terminal Server Edition	1381		2004-12-31
Windows 2000	NT 5.0	2000-02-17	NT 5.0	Windows 2000 Server Windows 2000 Advanced Server Windows 2000 Datacenter Server	2195	IA-32	2010-07-13
Windows Server 2003	Whistler Server	2003-04-24	NT 5.2	Windows Server Web Windows Server Standard Windows Server Enterprise Windows Server Datacenter Windows Storage Server	3790	IA-32, x86-64, Itanium	2015-07-14
Windows Server 2003 R2	Whistler Server	2005-12-06	NT 5.2		3790	IA-32, x86-64, Itanium	2015-07-14
Windows Server 2008	Longhorn Server	2008-02-27	NT 6.0	Windows Server Foundation Windows Server Standard Windows Server Enterprise Windows Server Datacenter Windows Server for Itanium-based Systems Windows Storage Server Windows Web Server	6002	IA-32, x86-64, Itanium	2020-01-14
Windows Server 2008 R2	Windows Server 7	2009-10-22	NT 6.1		7601	x86-64, Itanium	2020-01-14
Windows Server 2012	Windows Server 8	2012-09-04	NT 6.2	Windows Server Foundation Windows Server Essentials Windows Server Standard Windows Server Datacenter	9200	x86-64	2023-10-10
Windows Server 2012 R2	Windows Server Blue	2013-10-17	NT 6.3		9600		2023-10-10
Windows Server 2016	—	2016-10-12	1607	Windows Server Essentials Windows Server Standard Windows Server Datacenter	14393		2027-01-12
Windows Server, version 1709	—	2017-10-17	1709		16299		2019-04-09
Windows Server, version 1803	—	2018-04-30	1803		17134		2019-11-12
Windows Server, version 1809	—	2018-11-13	1809		17763		2020-11-10
Windows Server 2019	—	2018-11-13	1809		17763		2029-01-09
Windows Server, version 1903	—	2019-05-21	1903		18362		2020-12-08
Windows Server, version 1909	—	2019-11-12	1909		18363		2021-05-11
Windows Server, version 2004	—	2020-06-26	2004		19041		2021-12-14
Windows Server, version 20H2	—	2020-10-20	20H2		19042		2022-08-09
Windows Server 2022	—	2021-08-18	21H2		20348		2031-10-14

High-performance computing (HPC) servers

Name	Codename	Release date	Based on
Windows Compute Cluster Server 2003	—	2006-06-09	Windows Server 2003 R2
Windows HPC Server 2008	Socrates	2008-09-22	Windows Server 2008
Windows HPC Server 2008 R2	—	2010-09-20	Windows Server 2008 R2

Windows Essential Business Server

Name	Codename	Release date	End-of-support date	Build number	Based on
Windows Essential Business Server 2008	Centro	2008-09-15	2020-01-14	5700	Windows Server 2008

Windows Home Server

Name	Codename	Release date	End-of-support date	Based on
Windows Home Server	Quattro	2007-11-04	2013-01-08	Windows Server 2003 R2
Windows Home Server 2011	Vail	2011-04-06	2016-04-12	Windows Server 2008 R2

Windows MultiPoint Server

Windows MultiPoint Server was an operating system based on Windows Server. It was succeeded by the MultiPoint Services role in Windows Server 2016 and Windows Server version 1709. It was no longer being developed in Windows Server version 1803 and later versions.

Name	Codename	Release date	End-of-support date	Version number	Build number	Based on
Windows MultiPoint Server 2010	Solution Server	2010-02-24	2020-07-14	NT 6.1	537	Windows Server 2008 R2
Windows MultiPoint Server 2011	WMS 2	2011-05-12	2021-07-13	NT 6.1	1600	Windows Server 2008 R2 Service Pack 1
Windows MultiPoint Server 2012	WMS 3	2012-10-30	2023-10-10	NT 6.2	2506	Windows Server 2012

Windows Small Business Server

Name	Codename	Release date	End-of-support date	Build number	Based on
Small Business Server 2000	—	2001-02-21	2010-07-13	1343	Windows 2000 Server
Windows Small Business Server 2003	Bobcat	2003-10-09	2015-07-14	2893	Windows Server 2003
Windows Small Business Server 2008	Cougar	2008-08-21	2020-01-14	5601	Windows Server 2008
Windows Small Business Server 2011 Standard	Windows Small Business Server 7	2010-12-13	2020-01-14	7900	Windows Server 2008 R2
Windows Small Business Server 2011 Essentials	Colorado	2011-06-28	2013-01-05	8800	Windows Server 2008 R2

Device versions

ARM-based tablets

Windows RT logo

The Surface RT (shown with keyboard cover attached) was the flagship Windows RT device upon its release.

In 2012 and 2013, Microsoft released versions of Windows specially designed to run on ARM-based tablets; these versions of Windows were based on Windows 8 and Windows 8.1, respectively, although the standard versions could run on x86-based tablets without modification. Upon the release of Windows 10 in 2015, the ARM-specific version for large tablets was discontinued; large tablets (such as the Surface Pro 4) were only released with x86 processors and could run the full version of Windows 10. Windows 10 Mobile had the ability to be installed on smaller tablets (up to nine inches); however, very few such tablets were released, and Windows 10 Mobile primarily ended up only running on smartphones until its discontinuation. In 2017, the full version of Windows 10 gained the ability to run on ARM, which rendered a specific version of Windows for ARM-based tablets unnecessary.

Name	Release date	Version number	Build number	Based on
Windows RT	2012-10-26	NT 6.2	9200	Windows 8
Windows RT 8.1	2013-10-18	NT 6.3	9600	Windows 8.1

Mixed reality and virtual reality headsets

Name	Build number
Windows 10 Holographic, version 1607	14393
Windows 10 Holographic, version 1803	17134
Windows 10 Holographic, version 1809	17763
Windows Holographic, version 1903	18362
Windows Holographic, version 2004	19041
Windows Holographic, version 20H2	19041
Windows Holographic, version 21H1	20346
Windows Holographic, version 21H2	20348
Windows Holographic, version 22H1	20348

Surface Hub

Microsoft originally announced the Surface Hub, an interactive whiteboard, in January 2015. The Surface Hub family of devices runs a custom variant of Windows 10 known as Windows 10 Team.

Name	Build number
Windows 10 Team, version 1511	10586
Windows 10 Team, version 1607	14393
Windows 10 Team, version 1703	15063
Windows 10 Team, version 20H2	19042

Windows XP-based tablets

Tablet computer running a "Tablet PC Edition" of Windows XP

Two versions of Windows XP were released that were optimized for tablets. Beginning with Windows Vista, all tablet-specific components were included in the main version of the operating system.

Name	Codename	Release date	Version number	Build number	Based on
Windows XP Tablet PC Edition	—	2002-11-07	NT 5.1	2600	Windows XP
Windows XP Tablet PC Edition 2005	Lonestar	2004-08	NT 5.1	2600	Windows XP

Embedded versions

Windows Embedded Compact

Name	Codename(s)	Release date
Windows CE 1.0	Pegasus; Alder	1996-11-16
Windows CE 2.0	Jupiter; Birch	1997-09-29
Windows CE 2.1	—	1998-07
Windows CE 2.11	—	1998-10
Windows CE 2.12	—	1999
Windows CE 3.0	Cedar; Galileo	2000
Windows CE 4.0	Talisker	2002-01-07
Windows CE 4.1	Jameson	2002-07-30
Windows CE 4.2	McKendric	2003-04-23
Windows CE 5.0	Macallan	2004-07-09
Windows Embedded CE 6.0	Yamakazi	2006-11-01
Windows Embedded Compact 7	Chelan	2011-03-01
Windows Embedded Compact 2013	—	2013-06-13

Windows Embedded Standard

Name	Codename	Release date	Based on
Windows NT Embedded 4.0	Impala	1999-08-30	Windows NT 4.0 Workstation
Windows XP Embedded	Mantis	2001-11-28	Windows XP Professional
Windows Embedded Standard 2009	—	2008-12-14	Windows XP Service Pack 3
Windows Embedded Standard 7	Quebec	2010	Windows 7
Windows Embedded 8	—	2013	Windows 8
Windows Embedded 8.1	—	2013	Windows 8.1

Other embedded versions

Cancelled versions

Cancelled personal computer versions

Codename	Intended name	Discontinuation	Version	Latest known build number	Notes
Cairo	—	1996	NT 4.0	1175	Originally announced at the 1991 Microsoft Professional Developers Conference, Cairo was the codename of a project whose charter was to build technologies for a next-generation operating system that would fulfill Bill Gates's vision of "information at your fingertips." Cairo never shipped, although portions of its technologies have since appeared in other products.
Nashville	Windows 96	—	4.1	999	Nashville was an operating system planned to have been released between Windows 95 and Windows 98, presumably under the "Windows 96" moniker.
Neptune	—	Early 2000	NT 5.50	5111	Neptune, based on the Windows 2000 codebase, was planned to be the first version of Microsoft Windows NT to have a consumer edition variant. A version was sent out to testers but was never released. The teams working on Neptune and Odyssey eventually combined to work on Windows XP.
Odyssey	—	Early 2000	NT 6.0	—	Odyssey was planned to be the successor of Windows 2000. The teams working on Neptune and Odyssey eventually combined to work on Windows XP.
Triton	—	—	—	—	Triton was planned to be the successor of Windows Neptune and had been scheduled to be released in March 2001.
Blackcomb	—	2006-01	—	—	Blackcomb was originally planned to be a release of Windows following Windows XP. However, due to the large feature scope planned for Blackcomb, a smaller release codenamed "Longhorn" was planned first, and Blackcomb was delayed to 2003/2004. Both projects faced delays; Longhorn would go on to be released to consumers as "Windows Vista" in January 2007, while development on Blackcomb continued until the Blackcomb project was renamed "Vienna" in early 2006.
Vienna	—	2007-07	—	—	Vienna replaced Blackcomb and was intended as Windows Vista's successor. Vienna was eventually cancelled in favor of a new project codenamed "Windows 7" (which went on to be released in 2009 with the same name).
Polaris	—	2018	—	16299	Cancelled in favor of Santorini
Santorini	Windows 10X	2021-05-18	21H1	20279	Microsoft had been reported as working on a new "lite" version of Windows as early as December 2018. Such a version was officially announced under the name "Windows 10X" at an event in October 2019; the operating system was intended to first launch on dual-screen devices. In May 2020, Microsoft announced that Windows 10X would instead be launching on single-screen PCs, such as laptops and 2-in-1 devices, first. However, on May 18, 2021, Microsoft announced that Windows 10X would not be launching (at least not in 2021); many of its features were rolled into Windows 11 instead.

Cancelled mobile versions

Codename	Intended name	Discontinuation	Notes
Photon	Windows Mobile 7	September 2008	Originally a successor of Windows Mobile, it had been scrapped for Windows Phone 7
Phoenix	—	Early 2017	Cancelled when Microsoft "wound down" its phone efforts.
Andromeda	—	Mid-2018	Much of the work that was put into Andromeda was migrated into Santorini. The Surface Duo, a dual-screen Android-powered smartphone launched by Microsoft in 2020, was loosely based on the prototype hardware that had been used to test Andromeda.

Cancelled server versions

Codename	Intended name	Discontinuation	Latest known build number
Cascades	Windows Essential Business Server 2008 R2	April 7, 2010	7224