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Past Windows Client Versions
May 24, 2004

Windows 2000 and Windows XP are the only fully supported Windows client OSs as of June 2004.

All support for Windows NT 4.0 Workstation ends June 30, 2004, and only security-related hotfixes are available in the meantime.

The extended support phase for Windows 98, Windows 98 Second Edition, and Windows Me ends June 30, 2006. This is a major extension of time for these products: Windows 98 was scheduled to exit the extended support phase on Jan. 16, 2004, and the other two versions were due to leave the extended support phase Dec. 31, 2004.

Microsoft products are normally supported only with the most recent service pack, but customers receive one year, and sometimes two years, to migrate to that service pack. This means, for example, that Windows 2000 Professional with Service Pack 3 will be supported until June 26, 2004.

Windows XP Mainstream support, originally scheduled to end fairly close to the release date of Longhorn, will now end two years after that release date.

Product Current Service Pack Mainstream
Support Ends 		Extended
Support Ends 		Release History
Windows NT 4.0 Workstation SP6a; Nov. 30, 1999 June 30, 2002 June 30, 2003 Released: July 1996

SP1: Sept. 1996

SP2: Dec. 1996

SP3: Apr. 1997

SP4: Oct. 1998

SP5: May 1999
Windows 2000 Professional SP4; June 26, 2003 Mar. 31, 2005 Mar. 31, 2010 Released: Mar. 2000

SP1: July 2000

SP2: May 2001

SP3: Aug. 2002
Windows XP Professional SP1a; Sept. 4, 2002

SP2 in beta (anticipated mid-2004)		 Dec. 31, 2008 (subject to Longhorn release in 2006) Dec. 31, 2013 (five years after end of Mainstream support) Released: Sept. 2001
Windows XP Tablet PC Edition SP1a; Sept. 4, 2002 Dec. 31, 2006 Dec. 31, 2011 Released: Feb. 2003
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