On the weekend I was updating my sisters Toshiba notebook, which had been off the Internet for about a year. After updating anti virus & and other security programs, Vista updated itself.
After downloading all the new updates it shut itself down and proceeded to load the "3 critical updates".
Now all it keeps doing is restarting the PC and "loading update 3 of 3". Then repeating the whole process. I've tried starting in safe mode, last known good configuration, and all the other boot options, teh update keeps happening no matter what I do.