Windows XP Service Pack 3 in Technical Help Forum Posted May 7, 2008 Windows XP Service Pack 3 (KB936929) Windows XP Service Pack 3 (SP3) is an update to Windows XP that addresses key feedback from our customers and is a cumulative update that includes all previously released updates for Windows XP, including security updates. Windows XP SP3 contains a small number of new updates and should not significantly change the Windows XP experience. After you install this item, you may have to restart your computer. How to Uninstall This software update can be removed via Add or Remove Programs in Control Panel. Get help and support http://support.microsoft.com/winxp Be advised if you try to install SP3 using windows update, it will take hours. Download SP3 from Microsoft download centre first all 316mB of it, then install from downloaded program.