Service Pack Blocker Tool Kit for Vista SP1 and XP SP3 close to expiration

If you have used the Service Pack Blocker Tool for Windows XP or Windows Vista, then make sure you’re prepared for the expiration of the blocker tool. The Windows Vista blocker tool expires on April 28, 2009. The Windows XP SP3 blocker tool expires May 19, 2009,” a member of the Microsoft Update team stated.