Microsoft Windows Different Versions - (1985-2012)

1. Windows 1.01
    Release: 20.11.1985

2. Windows 2.03
    Release: 01.11.1987

3. Windows 3.0
    Release: 22.05.1990

4. Windows 3.1
    Release: 19.03.1992

5. Windows NT 3.1 
    Release: 27.07.1993

6. Windows NT 3.1 Advanced Server
    Release: 27.07.1993

7. Windows For Workgroups 3.11
    Release: 01.11.1993

8. Windows NT Server 3.5 
    Release: 21.09.1994

9. Windows NT Workstation 3.5 
    Release: 21.09.1994

10. Windows NT Server 3.51
      Release: 30.05.1995

11. Windows NT Workstation 3.51
      Release: 30.05.1995

12. Windows 95
      Release: 24.08.1995

13. Windows NT Server 4.0
      Release: 24.08.1996

14. Windows NT Workstation 4.0
      Release: 24.08.1996

15. Windows 98
     Release: 25.06.1998

16. Windows 98 SE
      Release: 05.05.1999

17. Windows 2000 Professional
     Release: 17.02.2000

18. Windows 2000 Server
      Release: 17.02.2000

19. Windows ME
     Release: 14.09.2000

20. Windows XP Home
      Release: 25.10.2001

21. Windows XP 64-bit Edition
      Release: 25.10.2001

22. Windows XP Professional
      Release: 25.10.2001

23. Windows Server 2003
      Release: 24.04.2003

24. Windows XP SP2
     Release: 06.08.2004

25. Windows Vista
      Release: 30.01.2007

26. Windows 7
      Release: 22.10.2009

Source: Wikipedia