Windows Vista Service Pack 1 (SP1) and Microsoft Office XP will reach the end of support on July 12, 2011. From that date onward, Microsoft will no longer provide support or free security updates for Windows Vista Service Pack 1 (SP1). In order to stay secure and continue support you must upgrade to Service Pack 2 (SP2).
Click on the clicks below to view Microsofts life (support) cycle of other Microsoft Office and Windows OS versions
Oh, and for computers that are still running Windows XP SP3, your end of life and end of support is April, 2014