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|Screenshot of the Longhorn Desktop|
|Source model||Closed source / Shared source[1|
|September 7, 2004|
|October 23, 2004|
|Latest release||Service Pack 4 May 4, 2009|
|Platforms||x86 and x64|
|Preceded by||Windows XP (2001)|
|Succeeded by||Windows Blackcomb (2011)|
|Mainstream support ended on 3 April 2011|
Extended support until 9 April 2020