History of operating systems By facebooker_10204684422846634 Sep 16, 1981 MS-DOS Nov 20, 1985 Windows 1.0 Dec 7, 1987 Windows 2.0 May 22, 1990 Windows 3.0 Aug 24, 1995 Windows 95 Jun 25, 1998 Windows 98 Feb 17, 2000 Windows 2000 Sep 14, 2000 Windows Me Oct 25, 2001 Windows XP Jan 30, 2007 Windows Vista Sep 22, 2009 Windows 7 Oct 26, 2012 Windows 8