Windows XP Service Pack 3 (SP3)
Updated May 6, 2008
http://technet.microsoft.com/en-us/windows...77c953a761.aspx
Windows XP Service Pack 3 (SP3) is now available for download and install via Windows Update and the Microsoft Download Center. Windows XP SP3 includes all previously released updates for the operating system, in addition to a small number of new updates. Windows XP SP3 will not significantly change the Windows XP experience.
Installation media and documentation on disc for Windows XP SP3 may sometimes refer to Windows XP SP2. Windows XP SP2 installation guide instructions apply to Windows XP SP3.
Installing Windows XP Service Pack 3 (SP3)
This document provides information about installing Windows XP Service Pack 3 (SP3). Both this document and the installation screens will guide you through the installation process.
http://technet.microsoft.com/en-us/windowsxp/cc164204.aspx
It's a very large package; a smaller "Update" for XP package will be available at a later date.