I have a PC that until recently was working fine ... now whenever it gets to the Windows XP Pro splash screen it kind of "glitches" after about 4 seconds of being on screen and then makes the PC reboot. This happens every time.

Until just now I could start up in safe mode (although NOT with networking as that had the same affect as above) .. but now even safe mode gives me the same issue.

The last thing I did when the PC was OK was to download all relevant security patches from Microsoft.
Since then I get this problem ... so I am guessing one of the patches has screwed me up ??? dunno !

Any ideas ? Or does any of this sound familiar ? Or do you need more info ?