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Windows Longhorn
Longhorndesktop
Screenshot of the Longhorn Desktop Build
Developer Microsoft
Source model Closed source / Shared source[1
Released to

manufacturing

May 30, 2005
General

availability

July 11, 2005
Latest release Service Pack 8 June 4, 2015
Platforms x128, x86 and x64 
Preceded by Windows XP (2001)
Succeeded by Windows Blackcomb (2008)
Support status
Mainstream support ended on 5 April 2024

Extended support until 9 April 2030