Windows NT

Windows 3.11

Period: Jul 27, 1990 to Dec 31, 2001

Windows NT 3.5

Period: Sep 21, 1993 to Dec 31, 2002

Windows NT 4.0

Period: Jul 31, 1996 to Jul 11, 2004

Windows 2000

Period: Dec 15, 1999 to Jul 13, 2008

internally Windows 5.0

Windows XP

Period: Aug 24, 2001 to Apr 8, 2014

internally Windows 5.1

Windows Vista

Period: Nov 8, 2006 to Apr 11, 2017

internally Windows 6.0

Windows 7.0

Period: Jul 22, 2009 to Jan 14, 2020

Windows 8.0

Period: Aug 1, 2012 to Jan 10, 2023

Windows 8.1

Period: Aug 27, 2013 to Jan 19, 2023

Windows 10.0

Period: Jul 15, 2015 to Oct 14, 2025