This hasn't been a problem before, but for a few days now my computer will not "Log Off" to Shut Down. It just stays on the "Logging Off" screen. I have not waiting an access amount of time for it, about 10min tops. Again, this worked fine before, its just become a problem in the last few days. I have been turning off my laptop by holding down the power button, which I know is not good for it but it won't turn off any other way. When I got to my log on screen once, I shut it down without logging in and it worked just fine. So, whats the problem? Any help would be appreciated.