I have had it happen twice now that due to updates from M/S, my PC would not function. The first time I had to do a system restore, but the next time, I had a message telling me that windows had not shut down properly. Thing is I hadn't tried to shut down Vista, only go to another site. Then the PC went into a black screen and would not come out of it. I've also had a memory dump issue as the machine continued to reboot
To make a longer sad story shorter. I was told by a tech that the recent updates are affecting Intel chipsets only. Maybe last year sometime, it was AMD's turn to have problems. I could go on, but enough. So far, things are back to normal. I don't know what M/S is trying to do, but it hasn't been a lot of fun for anyone. That is my little story.