For comic relief, read the thread I posted about the same problem:
http://www.freerepublic.com/focus/f-chat/1161710/posts
Then do a system restore.
That was a great thread. I recommend everyone to get a laugh from it. Well, it seems that this problem is not unheard of. With threads like this, and with the encouraging jokes, others will be able to fix these problems faster. For me, it was ALT, CTRL and the up arrow.