Windows XP Service Pack 3 (SP3) includes all previously released updates for the 32-Bit versions. Windows XP 64-Bit users will want the as the last XP 64-bit Service Pack.This update also includes a small number of new functionalities, which do not significantly change customers experience with the operating system.To clarify:The final service pack for Windows XP 64-Bit is.The final service pack for Windows XP 32-Bit is this download, Microsoft Windows XP Service Pack 3 - 32-Bit.There is no Service Pack 3 for Windows XP 64-Bit.For even more, you might want to check out, a cumulative update rollup for Windows XP (x86) English as well as security enhancements not addressed by Microsoft.