Microsoft OS Release Dates. This document is for educational / informational purposes only.

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Microsoft OS Release Dates
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Microsoft OS Release Dates
OPERATING SYSTEM RELEASE DATE TYPE PLATFORM
OS/2 1.0 1987 16-bit Non-GUI based
OS/2 1.1 1988 16-bit Non-GUI based
OS/2 1.2 1989 16-bit Non-GUI based
OS/2 2.0 1992 16-bit Non-GUI based
Windows 1.0/1.01 November 20, 1985 16-bit Desktop
Windows 2.0 December 9, 1987 16-bit Desktop
Windows 3.0 May 22, 1990 16-bit Desktop
Windows 3.1 April 6, 1992 16-bit Desktop
Windows for Workgroups 3.1 October 27, 1992 16-bit Server
Windows NT 3.1 and 3.1 Advance Server July 27, 1993 32-bit Server
Windows for Workgroups 3.11 November 8, 1993 16-bit Server
Windows NT 3.5 Server and Workstation September 21, 1994 32-bit Server
Windows NT 3.51 Server and May 30, 1995 32-bit Server
Workstation
Windows 95 August 24, 1995 16 & 32-bit Desktop
Windows NT 4.0 Server and Workstation August 24, 1996 32-bit Server
Windows 98 June 25, 1998 16 & 32-bit Desktop
Windows 98 SE May 9, 1999 16 & 32-bit Desktop
Windows 2000 Professional and Server February 17, 2000 32-bit Server & Desktop
Windows Me September 14, 2000 16 & 32-bit Desktop
Windows XP Home and Professional October 25, 2001 32-bit Desktop
Windows Server 2003 April 25, 2003 32 & 64-bit Server
Windows Server 2003 R2 December 6, 2005 32 & 64-bit Server
Windows XP Media Center Edition 2003 December 18, 2003 32-bit Multimedia
Windows XP Media Center Edition 2005 October 12, 2004 32-bit Multimedia
Windows XP Professional x64 Edition April 25, 2005 64-bit Server & Desktop
Windows Fundamentals for Legacy PCs June 08, 2006 32-bit For Thin-Client
(WinFLP)(XP SP2)
Windows Vista (for business use) November 30, 2006 32 & 64-bit Desktop
Windows Vista (for home use) January 30, 2007 32 & 64-bit Desktop
Windows Home Server August 2007 32 & 64-bit Server on Home
Desktop
Windows Server 2008 February 27, 2008 32 & 64-bit Server
Windows Server 2008 R2 October 22, 2009 64-bit only Server
Windows 7 October 22, 2009 32 & 64-bit Desktop
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