Microsoft Ends Windows XP SP2 Support Now and ALL XP Support Ends April 2014
Microsoft to End Support for Windows XP SP2 and Windows Server 2000 and Client (December 7, 2009) Users running older versions of Windows have seven months to upgrade to newer versions before Microsoft cuts off support.
As of July 13, 2010, Microsoft will no longer support windows XP SP2, Windows 2000 Server and Windows 2000 Client. Users of those operating systems are urged to upgrade to Windows 7, Windows Server 2003 or Windows Server 2008.
Microsoft is offering online resources to ease the transition, including a Windows XP to Windows 7 migration guide and a Windows 7 Automated Installation Kit. Microsoft will probably continue to issue important security updates for XP and 2000 after the official support period ends, but will no longer issue service packs or other non-critical updates.
Re: Microsoft Ends Windows XP SP2 Support
UPDATE Windows XP to SP3 Now...
As of July 13, 2010, Microsoft will no longer support Windows XP SP2,
However Windows XP with Service Pack 3 (SP3) Microsoft will probably continue to issue important security updates
Until April 8, 2014 Drop Dead Date... (all Support Ends)
Important notice for users of Windows XP:
To continue receiving security updates for Windows, make sure that you're running Windows XP with Service Pack 3 (SP3).
The support for Windows XP with Service Pack 3 ends April 8, 2014.
If you’re running Windows XP with Service Pack 3 (SP3) after support ends, to ensure that you will receive all important security updates for Windows, you need to upgrade to a later version, such as Windows 8.
For more information, see Support is ending for some versions of Windows.
Link to Windows XP Service Pack 3