Microsoft Windows By hburdick Nov 20, 1985 Windows 1 Dec 9, 1987 Windows 2 May 22, 1990 Windows 3 Aug 24, 1995 Windows 95 Aug 24, 1996 Windows NT 4 Jun 25, 1998 Windows 98 Feb 17, 2000 Windows 2000 Oct 25, 2001 Windows XP Jul 22, 2009 Windows 7 Oct 26, 2012 Windows 8