While Microsoft was supposed to release Windows XP Service Pack 3 (SP3)
on April 29, 2008, the service pack only became unofficially available
on the download.windowsupdate.com domain. Today, XP SP3 has officially
hit the Release to Web (RTW) milestone. In other words, SP3 is
available both on Windows Update and the Microsoft Download Center.
The final build of SP3 (5512) reportedly includes 1,073 fixes,
including every security update, out-of-band release, and hotfix
released since Windows XP SP2 hit Microsoft's servers back in August
2004. The release notes for SP3 have also been updated,
as has the MUI pack. Also, make sure you know what to do with your
version of Internet Explorer before installing the service pack.