WinXP graphic corruptions...Help!

Does anyone have any idea whats causing this, and how to fix it?

Note: the screenshot should really only show the startmenu looking fscked up, but the printscreen function seems to also capture a messed up everything else as well.


Specs should be the same as the ones in my profile.

But from my previous experience, a reinstall does seem to fix it. As well, it seems to be okay on the Linux side..