Support is ending for some versions of Windows
Support for Windows Vista without any service packs will end on April 13, 2010.
Support for Windows XP with Service Pack 2 (SP2) will end on July 13, 2010.*
If you're running one of these versions after support ends, you won't get security updates for Windows.
http://windows.microsoft.com/en-us/windows/help/end-support-windows-xp-sp2-windows-vista-without-service-packs?os=other
Support for Windows Vista without any service packs will end on April 13, 2010.
Support for Windows XP with Service Pack 2 (SP2) will end on July 13, 2010.*
If you're running one of these versions after support ends, you won't get security updates for Windows.
http://windows.microsoft.com/en-us/windows/help/end-support-windows-xp-sp2-windows-vista-without-service-packs?os=other