Here's a KB that addresses this problem by the way:
http://support.microsoft.com/kb/916089/
"Ra" <> skrev i meddelandet
news:1FAB1831-6663-42A9-93C9-...
>
> After 30 minutes or so, XP is now crashing, for the first time ever.
> I am forced to reboot and it often takes quite a while
> for the computer to do even that.
>
> I see that microsoft sent me 2 updates that day
> and I'm wondering if they might be causing my problems?
>
> Security Update for Windows XP (KB929969)
> &
> Windows Malicious Software Removal Tool - January 2007 (KB890830)
>
>
> Has anyone else had any issues starting on the 9th?
>
>
>