Windows operating systems

Personal computer Windows versions

Windows and Windows Server is an series that developed by Microsoft. In this section, a client version of Windows is a version that end-users or OEMs can install on personal computers, including desktop computers, laptops and workstations.

Name	Version	Release date	Codename	Additional information	Editions	Latest build	Unsupported as of
Windows 1.0x
Windows 1.00	1.00	November 6, 1985	Interface Manager	First release of Windows First public release of Windows	Windows/286 Windows/386	N/A	December 31, 2001
Windows 1.01	1.01	November 20, 1985		First international release of Windows
Windows 1.02	1.02	May 14, 1986
Windows 1.03	1.03	August 21, 1986
Windows 1.04	1.04	April 10, 1987
Windows 1.05	1.05	1987		An updated Chinese version of Windows 1.04
Windows 2.0x
Windows 2.00	2.00	December 9, 1987	Presentation Manager	They doesn't work with Intel 80486 processors	Windows/286 Windows/386	N/A	December 31, 2001
Windows 2.01	2.01
Windows 2.02	2.02
Windows 2.03	2.03
Windows 2.04	2.04	January 1988		An updated Chinese version of Windows 2.03
Windows 2.1x
Windows 2.1	2.1	May 27, 1988		This is the first OS that works with Intel 486	Windows/286 Windows/386 Windows/486	N/A	December 31, 2001
Windows 2.11	2.11	March 13, 1989
Windows 2.2	2.2	1990		A Chinese version of Windows 2.1
Windows 2.21	2.21			An updated version of Windows 2.2 or a Chinese version of Windows 2.11
Windows 3.0x
Windows 3.00	3.00	May 22, 1990		Like Windows 2.1x, Windows 3.0x does work with Intel 80486 processors	N/A	N/A	December 31, 2001
Windows 3.01	3.01	October 20, 1991		Sometimes called Windows Graphical Environment with Multimedia Extensions 1.0
Windows 3.1x
Windows 3.1	3.1	April 6, 1992	Janus		N/A	103	December 31, 2001
Windows for Workgroups 3.1	3.1	October 1992	Kato, Sparta
Windows 3.11	3.11	November 8, 1993	Janus			300
Windows for Workgroups 3.11	3.11	August 11, 1993	Snowball
Windows 3.2	3.2	November 22, 1993	Janus	Chinese version of Windows 3.1x		153
Windows for Workgroups 3.2	3.2	December 1993	Cougar	Chinese version of Windows for Workgroups 3.1x
Windows 9x
Windows 94	4.0	June 10, 1994	Project 9x	A beta version of Windows 95.		122	December 31, 2001
Windows 95	4.0	August 24, 1995	Chicago		Windows 95 Windows 95 Service Pack 1 (December 31, 1995) Windows 95 Service Pack 1.1 (February 14, 1996) Windows 95 Service Pack 2 (August 24, 1996) Windows 95 USB Supplement to Service Pack 2 (August 27, 1997) Windows 95 Service Pack 2.1 (August 27, 1997) Windows 95 Service Pack 2.5 (November 26, 1997)	950
Windows 96	4.1	May 3, 1996	Cleveland, Nashville		Windows 96 Windows 96 Service Pack 1 (1997)	1265 (RTM), 1326 (SP1)
Windows 97		June 24, 1997	ChiCairo		N/A	1538	December 31, 2004
Windows 98	4.2	June 21, 1998	Memphis	In winver, it incorrectly says 4.10, like Windows 96.	N/A	1998	July 11, 2006
Windows 99		April 23, 1999	Dolly	Also known as Windows 98 Second Edition.	N/A	2222A
Windows Me	4.99	September 14, 2000	Millennium		N/A	3000
Windows NT
Windows NT 3.1	NT 3.1	July 27, 1993	AXP	NT version of Windows 3.1	Windows NT 3.1 Workstation	511 (SP1)	December 31, 2001
Windows NT for Workgroups 3.1			Razzle	NT version of Windows for Workgroups 3.1	N/A	5xx
Windows NT 3.11	NT 3.11	1994	NT OS/2	NT version of Windows 3.11.	Windows NT 3.11 Workstation	528 (SP1)
Windows NT for Workgroups 3.11		1994	Razzle	NT version of Windows for Workgroups 3.11.	N/A	5xx
Windows NT 3.2	NT 3.2	1994	NT 3.2	NT version of Windows 3.2 or Chinese version of Windows NT 3.11.	Windows NT 3.2 Workstation	5xx
Windows 3.5	NT 3.5	September 21, 1994	Daytona		Windows 3.5 Workstation	807
Windows 3.51	NT 3.51	May 30, 1995			Windows 3.51 Workstation	1057.6 (SP5)
Windows NT 4.0	NT 4.0	August 24, 1996	Shell Update Release, NT 96		Windows NT 4.0 Workstation	1381.7097 (SP7)	December 3, 2004
Windows NT 5.0	NT 5.0	February 17, 2000	NT 5.0	The last Windows OS that was branded as "Windows NT".	Windows NT 5.0 Workstation	2195.7397 (SP5)	July 13, 2010
Windows 2000	NT 4.9		Memphis		Windows 2000 Professional
Windows Whistler	NT 5.1	October 24, 2000	Whistler	A beta version of Windows XP.	Windows Whistler Professional Windows Whistler Personal	2296	2013
Windows XP	NT 5.2	October 25, 2001	Odyssey		Windows XP Starter Windows XP Home Windows XP Professional Windows Fundamentals for Legacy PCs (July 8, 2006)	2600.7259 (SP4)	April 8, 2014
Windows 2003	NT 5.3	March 24, 2003	Triton	An x64 edition of Windows XP.	N/A	3790	July 14, 2015
Windows XP Professional x64 Edition		April 25, 2005	Sundown		N/A	3790.xxxx (SP3)	April 8, 2014
Windows Longhorn	NT 6.0	April 25, 2004 (pre-reset) April 1, 2005 (post-reset)	Longhorn	A beta version of Windows Vista.	Windows Longhorn Professional	4074 (pre-reset) 5048 (post-reset)	July 14, 2015
Windows Vista	NT 6.05	January 30, 2007	Six		Windows Vista Starter Windows Vista Home Basic Windows Vista Home Premium Windows Vista Business Windows Vista Enterprise Windows Vista Ultimate	6003.20597 (SP3)	April 11, 2017
Windows Vienna	NT 6.1	December 12, 2008	Blackcomb, Vienna	A beta version of Windows 7.	Windows Vienna Starter Windows Vienna Home Basic Windows Vienna Home Premium Windows Vienna Business Windows Vienna Enterprise Windows Vienna Ultimate	7000	January 14, 2020
Windows 7	NT 6.2	October 22, 2009	Seven		Windows 7 Starter Windows 7 Home Basic Windows 7 Home Premium Windows 7 Professional Windows 7 Enterprise Windows 7 Ultimate Windows Thin PC	7600.16905 (Update)
Windows 7.1		February 22, 2011 (as a service pack), August 30, 2011 (as a non-service pack)	Developer Preview (as a non-service pack), Vista 2 (as a service pack)		Windows 7.1 Starter Windows 7.1 Home Basic Windows 7.1 Home Premium Windows 7.1 Professional Windows 7.1 Enterprise Windows 7.1 Ultimate Windows 7.1 Thin PC	7601.24387 (Update), 8102.101 (as a non-service pack)
Windows 8	NT 6.3	October 26, 2012	Jupiter, Eight		Windows 8 Windows 8 Pro Windows 8 Home Windows 8 Enterprise Windows 8 Core Windows 8 OEM	9200	January 10, 2023
Windows 8.1		October 17, 2013	Blue		Windows 8.1 Windows 8.1 Pro Windows 8.1 Home Windows 8.1 Enterprise Windows 8.1 Core Windows 8.1 OEM Windows 8.1 with Bing	9600.16384
Windows 8.11		April 8, 2014	8.1 Update 1	An updated version of Windows 8.1. Windows 8.2 is a Chinese version.	Windows 8.11 Windows 8.11 Pro Windows 8.11 Home Windows 8.11 Enterprise Windows 8.11 Core Windows 8.11 OEM Windows 8.11 with Bing	9600.17476 (as Windows 8.11) 9600.31213 (Chinese version)
Windows 9	NT 6.4	September 12, 2014	Technical Preview		Windows 9 Windows 9 Pro Windows 9 Home Windows 9 Enterprise Windows 9 Core	9841	2024 or 2025
Windows 10	NT 10.0	July 29, 2015 (1507) November 10, 2015 (1511) August 2, 2016 (1607) April 5, 2017 (1703) October 17, 2017 (1709) April 30, 2018 (1803) November 13, 2018 (1809) May 21, 2019 (1903) November 12, 2019 (1909)	Threshold (1507) Threshold 2 (1511) Redstone (1607) Redstone 2 (1709) Redstone 3 (1709) Redstone 4 (1803) Redstone 5 (1809) 19H1 (1903) 19H2 (1909)	Also known as Windows X	Windows 10 Home Windows 10 Pro Windows 10 Pro Education Windows 10 Pro for Workstations Windows 10 Enterprise Windows 10 Enterprise LTSC (formerly LTSB) Windows 10 Education Windows 10 IoT Core Windows 10 IoT Enterprise Windows 10 S (now an operational mode within Enterprise and Education)	10240 (1507) 10586 (1511) 14393 (1607) 15063 (1703) 16299 (1709) 17134 (1803) 17763 (1809) 18362.116 (1903) 18363.418 (1909)	October 14, 2025
Windows 2020		May 27, 2020 (2004), 2020 (2009), 2021 (21H1)	20H1 (2004), 20H2 (20H2), 21H1 (21H1)	A successor to Windows 10 November 2019 Update.	Windows 2020 Home Windows 2020 Pro Windows 2020 Pro Education Windows 2020 Pro for Workstations Windows 2020 Enterprise Windows 2020 Enterprise LTSC Windows 2020 Education Windows 2020 IoT Core Windows 2020 IoT Enterprise Windows 2020 S	19041.208 (2004)	2030?
Windows 11	October 5, 2021	21H2	A succesor to Windows 10.	*Windows 11 Home Windows 11 Pro Windows 11 Pro Education Windows 11 Pro for Workstations Windows 11 Enterprise Windows 11 Enterprise LTSC (formerly LTSB) Windows 11 Education Windows 11 IoT Core Windows 11 IoT Enterprise Windows 11 S (now an operational mode within Enterprise and Education)
Windows 2024	June 11, 2024	24H2	A successsor to Windows 11 2024 Update.	*Windows 2024 Home Windows 2024 Pro Windows 2024 Pro Education Windows 2024 Pro for Workstations Windows 2024 Enterprise Windows 2024 Enterprise LTSC Windows 2024 Education Windows 2024 IoT Core Windows 2024 IoT Enterprise Windows 2024 S
Windows 12	October 9, 2024	24H2	A successor to Windows 11.

Server versions

Name	Version	Release date	Codename	Additional information	Editions	Latest build	Unsupported as of
Windows NT 3.1	NT 3.1	July 27, 1993	AXP	NT version of Windows 3.1	Windows NT 3.1 Server Windows NT 3.1 Advanced Server	511 (SP1)	December 31, 2001
Windows NT 3.11	NT 3.11	1994	NT OS/2	NT version of Windows 3.11	Windows NT 3.11 Server Windows NT 3.11 Advanced Server	528 (SP1)
Windows NT 3.2	NT 3.2	1994	NT 3.2	NT version of Windows 3.2 or Chinese version of Windows NT 3.11	Windows NT 3.2 Server Windows NT 3.2 Advanced Server	5xx
Windows 3.5	NT 3.5	September 20, 1994	Daytona		Windows 3.5 Server	807
Windows 3.51	NT 3.51	May 29, 1995			Windows 3.51 Server	1057.6 (SP5)
Windows NT 4.0	NT 4.0	July 29, 1996	Shell Update Release, NT 96		Windows NT 4.0 Server Windows NT 4.0 Enterprise Server Windows NT 4.0 Terminal Server	1381.7097 (SP7)	December 3, 2004
Windows NT 5.0	NT 5.0	February 17, 2000	NT 5.0	The last Windows OS that was branded as "Windows NT".	Windows NT 5.0 Server Windows NT 5.0 Advanced Server Windows NT 5.0 Datacenter Server	2195.7397 (SP5)	July 13, 2010
Windows Server 2000	NT 4.9		Memphis	A server counterpart of Windows 2000	Windows Server 2000 Windows Advanced Server 2000 Windows Datacenter Server 2000
Windows Server 2000 R2	NT 5.1	October 24, 2000	Whistler Server	A server counterpart of Windows Whistler.	Windows Server 2000 R2 Windows Advanced Server 2000 R2 Windows Datacenter Server 2000 R2	2296	2013
Windows Server 2001	NT 5.2	October 25, 2001	Odyssey Server	A server counterpart of Windows XP.	Windows Server 2001 Windows Advanced Server 2001	2600.7259 (SP4)	April 8, 2014
Windows Server 2003	NT 5.3	April 24, 2003	Triton Server	A server counterpart of Windows 2003.	Windows Standard Server 2003 Windows Enterprise Server 2003 Windows Datacenter Server 2003 Windows Web Server 2003 Windows Storage Server 2003 Windows Small Business Server 2003	3790.xxxx (SP3)	July 14, 2015
Windows Server 2004	NT 6.0	April 25, 2004	Longhorn Server (pre-reset)	A server counterpart of Windows Longhorn.	Windows Standard Server 2004 Windows Enterprise Server 2004 Windows Datacenter Server 2004 Windows Web Server 2004 Windows Small Business Server 2004	4074
Windows Server 2003 R2	NT 6.0	April 1, 2005	Longhorn Server (post-reset)	Another server counterpart of Windows Longhorn.	Windows Standard Server 2003 R2 Windows Enterprise Server 2003 R2 Windows Datacenter Server 2003 R2 Windows Web Server 2003 R2 Windows Storage Server 2003 R2 Windows Small Business Server 2003 R2 Windows Compute Cluster Server 2003	5048
Windows Server 2007	NT 6.05	January 30, 2007	Server 6, Vista Server	A server counterpart of Windows Vista.	Windows Standard Server 2007 Windows Enterprise Server 2007 Windows Datacenter Server 2007 Windows Server 2007 for Itanium-based Systems Windows Foundation Server 2007 Windows Essential Business Server 2007 Windows HPC Server 2007 Windows Small Business Server 2007 Windows Storage Server 2007 Windows Web Server 2007 Windows Home Server	6003.20597 (SP3)	April 11, 2017
Windows Server 2008	NT 6.1	December 12, 2008	Vienna Server	A server counterpart of Windows Vienna.	Windows Standard Server 2008 Windows Enterprise Server 2008 Windows Datacenter Server 2008 Windows Server 2008 for Itanium-based Systems Windows Foundation Server 2008 Windows Essential Business Server 2008 Windows HPC Server 2008 Windows Small Business Server 2008 Windows Storage Server 2008 Windows Web Server 2008	7000	January 14, 2020
Windows Server 2008 R2	NT 6.2	October 22, 2009	Server 7		Windows Foundation Server 2008 R2 Windows Standard Server 2008 R2 Windows Enterprise Server 2008 R2 Windows Datacenter Server 2008 R2 Windows Server 2008 R2 for Itanium-based Systems Windows Web Server 2008 R2 Windows Storage Server 2008 R2 Windows HPC Server 2008 R2 Windows Small Business Server 2010 Windows Home Server 2010 Windows MultiPoint Server 2010	7600.16905 (Update)
Windows Server 2008 R3		October 22, 2011 (as a service pack), August 30, 2011 (as a non-service pack)	Server 7.1		Windows Foundation Server 2008 R3 Windows Standard Server 2008 R3 Windows Enterprise Server 2008 R3 Windows Datacenter Server 2008 R3 (the only edition that was available for non-service pack version) Windows Server 2008 R3 for Itanium-based Systems Windows Web Server 2008 R3 Windows Storage Server 2008 R3 Windows HPC Server 2008 R3 Windows Small Business Server 2011 Windows MultiPoint Server 2011 Windows Home Server 2011	7601.24387 (Update), 8102.101 (as a non-service pack)
Windows Server 2012	NT 6.3	September 4, 2012	Server 8		Windows Foundation Server 2012 Windows Essentials Server 2012 Windows Standard Server 2012 Windows Datacenter Server 2012 Windows MultiPoint Server 2012	9200	October 10, 2023
Windows Server 2012 R2		October 17, 2013	Server Blue, Server 8.1		Windows Foundation Server 2012 R2 Windows Essentials Server 2012 R2 Windows Standard Server 2012 R2 Windows Datacenter Server 2012 R2 Windows MultiPoint Server 2012 R2	9600.16384
Windows Server 2012 R2.1		April 8, 2014	Server 8.11	An updated version of Windows Server 2012 R2.	Windows Foundation Server 2012 R2.1 Windows Essentials Server 2012 R2.1 Windows Standard Server 2012 R2.1 Windows Datacenter Server 2012 R2.1 Windows MultiPoint Server 2012 R2.1	9600.17476 (as Windows Server 2012 R2.1) 9600.31213 (Chinese version)
Windows Server 2014	NT 6.4	September 12, 2014	Server 9		Windows Essentials Server 2014 Windows Standard Server 2014 Windows Datacenter Server 2014	9841	2024 or 2025
Windows Server 2016	NT 10.0	October 12, 2016	Threshold Server		Windows Essentials Server 2016 Windows Standard Server 2016 Windows Datacenter Server 2016	10586	January 12, 2027
Windows Server 2019		May 21, 2019	Server 19H1		Windows Essentials Server 2019 Windows Standard Server 2019 Windows Datacenter Server 2019	18362.116	January 9, 2029
Windows Server 2020		May 27, 2020	Server 20H1	A server counterpart of Windows 2020.	Windows Essentials Server 2020 Windows Standard Server 2020 Windows Datacenter Server 2020	19041.208	2030?
Windows Server 2022	20348	August 18, 2021	21H2	A client counterpart of Windows 10 21H2
Windows Server 2023	25398	October 17, 2023	23H2	A client counterpart of Windows 11 2023 Update
Windows Server 2025	26100	July 25, 2024	24H2	A client counterpart of Windows 11 2024 Update
Windows Server 2025 R2	27547	November 6, 2025	25H2	A client counterpart Windows 11 2024 Update

Device versions

Appliances

Name	Version	Release date	Codename	An edition of	Additional information	Sold with
Windows XP Media Center Edition	NT 5.2/NT 5.3	2001, 2002, 2003, 2004, 2005, and 2006	Trident (2001) eHome (2002) Freestyle (2003) Harmony (2004) Symphony (2005) Emerald (2006)	Windows XP		Home theater PCs, network attached storage (NAS) and set-top boxes
Windows XP Tablet PC Edition		November 2002, 2003, August 2004, and 2005	Mira (2002) Lonestar (2005)			Microsoft Tablet PC
Windows RT	NT 6.2	October 26, 2012	Windows on ARM	Windows 8		ARM-based tablet computers
Windows RT 8.1	NT 6.3	October 18, 2013	RT Blue	Windows 8.1
Windows RT 8.11		April 8, 2014	RT 8.1 Update 1	Windows 8.11
Windows RT 8.2		2014		Windows 8.2	A Chinese version of Windows RT 8.1

Mobile devices

Mobile devices include smartphones, handheld tablet computers, and personal digital assistants

• Windows 2020
  • Windows 2020 Mobile
  • Windows 2020 Mobile Enterprise
  • Windows 2020 IoT Mobile
  • Windows 2020 IoT Mobile Enterprise
• Windows 10
  • Windows 10 Mobile
  • Windows 10 Mobile Enterprise
  • Windows 10 IoT Mobile
  • Windows 10 IoT Mobile Enterprise
• Windows 9
• Windows 9 Mobile
• Windows 9 Mobile Enterprise
• Windows Phone
  • Windows Phone 8.2
  • Windows Phone 8.11
  • Windows Phone 8.1
  • Windows Phone 8
  • Windows Phone 7.8
  • Windows Phone 7.5
  • Windows Phone 7.1
  • Windows Phone 7
• Windows Mobile
  • Windows Mobile 6.5
  • Windows Mobile 6.1
  • Windows Mobile 6.0
  • Windows Mobile 5.1
  • Windows Mobile 5.0
  • Windows Mobile 2003 Third Edition
  • Windows Mobile 2003 Second Edition
  • Windows Mobile 2003
  • Pocket PC 2002
  • Pocket PC 2001
  • Pocket PC 2000

Embedded devices

• Windows Embedded
  • Windows Embedded 9
  • Windows Embedded 8.11
  • Windows Embedded 8.1
  • Windows Embedded 8
  • Windows Embedded 7.1
  • Windows Embedded 7
  • Windows Embedded Automotive
  • Windows Embedded Industry
  • Windows Embedded 2009
  • Windows XP Embedded
  • Windows NT 4.0 Embedded – Abbreviated NTe, it is an edition of Windows NT 4.0 that was aimed at computer-powered major appliances, vending machines, ATMs and other devices that cannot be considered computers per se. It is the same system as the standard Windows NT 4.0, but it comes packaged in a database of components and dependencies, from which a developer can choose individual components to build customized setup CDs and hard disk boot images. Windows NT 4.0 Embedded includes Service Pack 5. Before 1998, it used to be called Windows NT 4.1.
• Windows Embedded Compact
  • Windows Embedded Compact 2013
  • Windows Embedded Compact 7.1
  • Windows Embedded Compact 7
  • Windows Embedded CE 6.1 (2007)
  • Windows Embedded CE 6.0 (2006)
  • Windows CE 5.1 (2006), with a version for smartphones and PDAs sold as Windows Mobile 5.1
  • Windows CE 5.0 (2005), with a version for smartphones and PDAs sold as Windows Mobile 5.0
  • Windows CE 4.3 (2005), with a version for smartphones and PDAs sold as Windows Mobile 2003 TE
  • Windows CE 4.2 (2004), with a version for smartphones and PDAs sold as Windows Mobile 2003 SE
  • Windows CE 4.1 (2003), with a version for smartphones and PDAs sold as Windows Mobile 2003
  • Windows CE 4.0 (2002), with a version for smartphones and PDAs sold as Pocket PC 2002
  • Windows CE 3.1 (2001), with a version for smartphones and PDAs sold as Pocket PC 2001
  • Windows CE 3.0 (June 2000), with a version for smartphones and PDAs sold as Pocket PC 2000
  • Windows CE 2.13 (January 2000)
  • Windows CE 2.12 (August 1999)
  • Windows CE 2.11 (October 1998)
  • Windows CE 2.1 (July 1998)
  • Windows CE 2.0 (September 1997)
  • Windows CE 1.0 (November 1996)

Dual screen devices

• Windows 2020X

Cancelled versions

• Windows Mobile 7 or Photon - originally a successor of Windows Mobile, it had been scrapped for Windows Phone 7 with Metro UI.
• Microsoft Neptune (December 27, 1999) – the first planned version of Microsoft Windows NT to have a consumer edition variant, based on the Windows 2000 codebase. A version was sent out to testers but was never released.
• Microsoft Cairo (February 29, 1996) – a "true object-oriented OS", planned after Windows NT 4.0.
• Microsoft Midori (2003) – codename for a managed code operating system.