you're not alone,I just experienced the same problem
I had to get into another account(I couldn't remember the admin password) and i went to system restore and restored my computer back to a better time. works fine now. who knows why it did it in the first place.
EP, glad to see you come back and tidy up...did want to ask a one day favor, I want to enhance my resume , was hoping you could make me administrator for a day, if so, take me right off since I won't be here to do anything, and don't know the slightest about the board, but it would be nice putting "served administrator osnn", if can do, THANKS