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first development of windows.
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The first independent version of Microsoft Windows, version 1.0, released on 20 November 1985, achieved little popularity
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Microsoft Windows version 2 came out on 9 December 1987, and proved slightly more popular than its predecessor
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In August 2006, Microsoft released updated installation media for Windows XP SP2 and Windows Server 2003 SP1 to contain a patch
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Windows Vista was released on November 30, 2006 to business customers, consumer versions following on January 30, 2007
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Windows Server 2008, released on February 27, 2008, was originally known as Windows Server Codename "Longhorn".
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As of the end of September 2010, Windows XP is the most widely used operating system in the world with a 51.7% market share, having peaked at 76.1% in January 2007.