Man, I'm almost hurting myself. This *exact* same thing happened to me about 3-4 months ago at work, but I don't remember what I did to fix it. This is so aggervating! If I remember what I did, I'll post back.
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About 5% of the people in the world can't think.
Another 5% can think and do.
The remaining 90% can think, but don't.
Well, I did the msconfig and booted into diagnostic mode... the problem went away. I went back to normal boot and Windows said I needed to reactivate it... I did the reactivation and everything seems fine... for now...