Realsed date: November 1985, Windows 1.0
Realsed date: November 1987, Windows 2.0
Realsed date: May 1990, Windows 3.0
Realsed date: March 1992, Windows 3.1
Realsed date: July 1993, Windows NT 3.1
Realsed date: August 24, 1995, Windows 95
Realsed date: July 29, 1996, Windows NT 4.0
Realsed date: March 18, 1998, Windows 98
Realsed date: February 17, 2000, Windows 2000
Realsed date: September 14, 2000, Windows ME (Millenium)
Realsed date: October 25, 2001, Windows XP
Realsed date: April 24, 2003, Windows Server 2003
Realsed date: January 2004, Windows XP Media Center
Realsed date: November 8, 2006, Windows Vista
Realsed date: February4, 2008, Windows Server 2008
Released date: Unknown xx,2010, Windows 7 (Seven)