ARRRRRRGGGGG.
Yesterday evening I did a windows update from the microsoft site.
It downloaded about 5 megs of security updates.

Now when I try to boot, right after it gets out of the low-res image of windows 2000 pro (built on NT technology) with the scrolly thing across the bottom, and goes into the bluey-greeny background of windows it reboots.

If I'm running in safe mode I manage to see a blue screen error but its only there for a split second so I can't see what it is.

Any bright ideas ?