Microsoft announced that this year, “following Windows products/Service Packs will reach end of life on three: • Windows XP Service Pack 2 will no longer be supported as of July 13, 2010. Many customers are still on this version so we encourage upgrading to Service Pack 3 or to Windows 7 as soon as possible. • Windows Vista RTM will no longer be supported as of April 13, 2010. Service Pack 1 will still be supported until July 12, 2011 but we recommend customers update to Service Pack 2 or Windows 7 at this time. • Extended support for Windows 2000 will also be retired on July 13, 2010. At that time, we will no longer provide security or any other updated for Windows 2000. Its important that customers stay current with the latest updates and Service Packs,” MSRC.
More info: Support lifecycle policies