List of Windows operating systems

Personal computer versions

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	Unsupported as of
Windows 1.0x
Windows 1.00	1.00	November 6, 1985	Interface Manager	First release of Windows	Windows/286 Windows/386	December 31, 2001
Windows 1.01	1.01	November 20, 1985
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 2.0x
Windows 2.00	2.00	December 9, 1987		They doesn't work with Intel 80486 processors	Windows/286 Windows/386	December 31, 2001
Windows 2.01	2.01
Windows 2.02	2.02
Windows 2.03	2.03
Windows 2.1x
Windows 2.1	2.1	May 27, 1988			Windows/286 Windows/386 Windows/486	December 31, 2001
Windows 2.11	2.11	March 13, 1989
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	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	December 31, 2001
Windows for Workgroups 3.1	3.1	October 1992	Kato, Sparta
Windows 3.11	3.11	November 8, 1993	Janus
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
Windows for Workgroups 3.2	3.2	December 1993	Cougar	Chinese version of Windows for Workgroups 3.1x
Windows 9x
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)	December 31, 2001
Windows 96	4.1	May 3, 1996	Cleveland, Nashville		Windows 96 Windows 96 Service Pack 1 (1997)
Windows 97		June 24, 1997	Detroit		N/A	December 31, 2004
Windows 98	4.2	June 21, 1998	Memphis	In winver, it says 4.10, like Windows 96.	N/A	July 11, 2006
Windows 99		April 23, 1999	98 SE	Also known as Windows 98 Second Edition	N/A
Windows Me	4.9	September 14, 2000	Millennium		N/A
Windows NT
Windows NT 3.1	NT 3.1	July 27, 1993	AXP	NT version of Windows 3.1	Windows NT 3.1 Workstation	December 31, 2001
Windows NT for Workgroups 3.1			Razzle	NT version of Windows for Workgroups 3.1	N/A
Windows NT 3.11	NT 3.11	January 24, 1994	NT OS/2	NT version of Windows 3.11.	Windows NT 3.11 Workstation
Windows NT for Workgroups 3.11		October 8, 1993	Razzle	NT version of Windows for Workgroups 3.11.	N/A
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
Windows 3.5	NT 3.5	September 21, 1994	Daytona		Windows 3.5 Workstation
Windows 3.51	NT 3.51	May 30, 1995			Windows 3.51 Workstation
Windows NT 4.0	NT 4.0	August 24, 1996	Shell Update Release		Windows NT 4.0 Workstation	December 3, 2004
Windows NT 5.0	NT 5.0	February 17, 2000	NT 5.0		Windows NT 5.0 Workstation	July 13, 2010
Windows 2000			Memphis		Windows 2000 Professional
Windows XP	NT 5.1	October 25, 2001	Whistler		Windows XP Starter Windows XP Home Windows XP Professional Windows XP 64-bit Edition Windows Fundamentals for Legacy PCs (July 8, 2006)	April 8, 2014
Windows XP Professional x64 Edition	NT 5.2	April 25, 2005	N/A		N/A
Windows Longhorn	NT 6.0	April 1, 2005	Longhorn	A beta version of Windows Vista.	Windows Longhorn Professional	July 14, 2015
Windows Vista		January 30, 2007	Six		Windows Vista Starter Windows Vista Home Basic Windows Vista Home Premium Windows Vista Business Windows Vista Enterprise Windows Vista Ultimate	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	January 14, 2020
Windows 7		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
Windows 7.1	NT 6.11	February 22, 2011	7.1		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
Windows 8	NT 6.2	October 26, 2012	Jupiter, Eight		Windows 8 Windows 8 Pro Windows 8 Home Windows 8 Enterprise Windows 8 Core Windows 8 OEM	January 10, 2023
Windows 8.1	NT 6.3	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
Windows 8.11		April 8, 2014	8.1 Update 1	An updated version of Windows 8.1.	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
Windows 9	NT 6.4	September 12, 2014	Technical Preview		Windows 9 Windows 9 Pro Windows 9 Home Windows 9 Enterprise Windows 9 Core	2024 or 2025
Windows 10	NT 10.0	July 29, 2015	Threshold	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)	October 14, 2025
Windows 2020		2020	20H1	A successor to Windows 10 19H2. Not yet finished.	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	Not yet released

Server versions

Name	Version	Release date	Codename	Additional information	Editions	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	December 31, 2001
Windows NT 3.11	NT 3.11	1993	NT OS/2	NT version of Windows 3.11	Windows NT 3.11 Server Windows NT 3.11 Advanced Server
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
Windows 3.5	NT 3.5	September 20, 1994	Daytona		Windows 3.5 Server
Windows 3.51	NT 3.51	May 29, 1995			Windows 3.51 Server
Windows NT 4.0	NT 4.0	July 29, 1996	Shell Update Release		Windows NT 4.0 Server Windows NT 4.0 Enterprise Server Windows NT 4.0 Terminal Server	December 3, 2004
Windows NT 5.0	NT 5.0	February 17, 2000	NT 5.0		Windows NT 5.0 Server Windows NT 5.0 Advanced Server Windows NT 5.0 Datacenter Server	July 13, 2010
Windows Server 2000			Memphis	A server counterpart of Windows 2000	Windows Server 2000 Windows Advanced Server 2000 Windows Datacenter Server 2000
Windows Server 2003	NT 5.2	April 24, 2003	Whistler Server	A server counterpart of Windows XP.	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	July 14, 2015
Windows Server 2003 R2	NT 6.0	December 6, 2005	Longhorn Server	A 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 Windows Home Server
Windows Server 2007		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	April 11, 2017
Windows Server 2008	NT 6.1	February 27, 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	January 14, 2020
Windows Server 2008 R2		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
Windows Server 2008 R3	NT 6.11	October 22, 2011	Server 7.1		Windows Foundation Server 2008 R3 Windows Standard Server 2008 R3 Windows Enterprise Server 2008 R3 Windows Datacenter Server 2008 R3 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
Windows Server 2012	NT 6.2	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	October 10, 2023
Windows Server 2012 R2	NT 6.3	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
Windows Server 2012 R3		April 8, 2014	Server 8.11	An updated version of Windows Server 2012 R2.	Windows Foundation Server 2012 R3 Windows Essentials Server 2012 R3 Windows Standard Server 2012 R3 Windows Datacenter Server 2012 R3 Windows MultiPoint Server 2012 R3
Windows Server 2014	NT 6.4	September 12, 2014	Server 9		Windows Essentials Server 2014 Windows Standard Server 2014 Windows Datacenter Server 2014	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	January 12, 2027
Windows Server 2019		May 21, 2019	Server 19H1		Windows Essentials Server 2019 Windows Standard Server 2019 Windows Datacenter Server 2019	January 9, 2029
Windows Server 2020		2020	Server 20H1	A successor to Windows Server 19H2. Not yet finished.	Windows Essentials Server 2020 Windows Standard Server 2020 Windows Datacenter Server 2020	Not yet released

Device versions

Appliances

Name	Version	Release date	An edition of	Additional information	Sold with
Windows XP Media Center Edition	NT 5.1/NT 5.2	2001, 2002, 2003, 2004, 2005, and 2006	Windows XP		Home theater PCs, network attached storage (NAS) and set-top boxes
Windows XP Tablet PC Edition		November 2002, 2003, 2004, and 2005			Microsoft Tablet PC
Windows RT	NT 6.2	October 26, 2012	Windows 8		ARM-based tablet computers
Windows RT 8.1	NT 6.3	October 18, 2013	Windows 8.1
Windows RT 8.11		April 8, 2014	Windows 8.11

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 8.11
  • 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)

Canceled versions

• Microsoft Odyssey – a version intended to be an update to the Microsoft Windows NT 5.x codebase. The teams working on Neptune and Odyssey combined to work on Windows XP.
• 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 Triton (2001) – a planned successor to Microsoft Neptune.
• Windows NT 4.1 (1997) – former name of Windows NT 4.0 Embedded.
• 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.
• Windows 4.0 (1995) – former name of Windows 95.
• Windows 4.1 (1996) – former name of Windows 96.
• Windows 4.2 (1998) – former name of Windows 98.
• Windows 4.9 (2000) – former name of Windows Me.
• Windows 5 (1999) – former names of Windows 2000.
• Windows 2000 Server (1999) - former name of Windows Server 2000.
• Windows 2001 (2001), Windows 101 (2001), Windows 5.1 (2001), Windows NT XP (2001), and Windows NT 5.1 (2001) – former names of Windows XP.
• Windows 6 (2006) – former name of Windows Vista.
• Windows 8.2 (2014) – former name of Windows 9.
• Windows 9.1 (2015) – former name of Windows 10.
• Windows 10 20H1 (2020) – former name of Windows 2020.
• Windows Server 20H1 (2020) and Windows 2020 Server (2020) – former names of Windows Server 2020.