目前微軟已推12Windows NT操作系統即推2Windows NT操作系統
別：
Microsoft Windows NT 3.1 (1993)
Microsoft Windows NT 3.5 (1994)
Microsoft Windows NT 3.51 (1995)
Microsoft Windows NT 4.0 (1996)
(5.0版始Windows NT簡單稱Windows面版本版本)
Microsoft Windows 2000 (Windows NT 5.0) (1999)
Microsoft Windows XP (Windows NT 5.1) (2001)
Microsoft Windows Server 2003 (Windows NT 5.2) (2003)
Microsoft Windows Vista (Windows NT 6.0) (2006)
Microsoft Windows Server 2008 (Windows NT 6.0) (2008)
Microsoft Windows 7 (Windows NT 6.1) (2009)
Microsoft Windows Server 2008 R2 (Windows NT 6.1) (2011)
Microsoft Windows Slate (Windows NT 6.2) (測試)
Microsoft Windows 9(Windows NT 6.3)(目前微軟發該系統計劃預計2016推)