Windows XP Service Pack 1 includes all of the updates for Windows up to March 2003.
If you have a new system without any updates, this is the quickest way to bring it up to date. It includes support for USB 2.0 devices and for other hardware devices.
There are two versions: express install and network install.
This download is for the express install, which checks your system first and then downloads only the files needed to update Windows.
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