Windows XP SP3 Update

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.
This file is a CD image file for users who wish to create an update CD for Windows XP Service Pack 3, for example for offline installation by administrators.

This is the original update file, downloaded from Microsoft's website.