Windows XP Service Pack 3 - ISO-9660 CD Image File
Here is the ISO if you need it
Brief Description
Windows® XP Service Pack 3 (SP3) includes all previously released updates for the operating system. This update also includes a small number of new functionalities, which do not significantly change customers’ experience with the operating system.
http://www.microsoft.com/downloads/details.aspx?familyid=2FCDE6CE-B5FB-4488-8C50-FE22559D164E&displaylang=en