It appears that along with several of my co-workers, my computer at work has been infected with the MSBlast worm. So far today, I've been able to use my computer for about 5 or 10 minutes before it decides to reboot.
I should really just go home, I guess. There's probably very little point for me to stay here and try to work.
[Edit: My machine is now patched and it's back to the regular routine of work.]