Microsoft is about to end support for Windows XP and Windows Vista soon. Microsoft announced the dates of ending the support above Windows Operating System.
Support for Windows XP with Service Pack 2 (SP2) will end on July 13, 2010. ( Only 32-bit)
Support for Windows XP with Service Pack 2 (SP2) will end on April 8, 2014. (Only 64-bit as there is no SP3 for it).
Support for Windows Vista without any Service Pack will end on April 13, 2010.
What if your Windows is no longer suppported?
It means that you will not be further recieving any sort of software updates from Windows Update which includes the latest software updates which are helpful to improve the drivers update for better and improved compatibility and the security updates which are helpful in protecting your PC from Web threats like viruses, malware, spywares etc.
Some important Windows Update links for your Windows are here: