Our IT guy is out today. When one of our guys tired to log into their computer, they were able to turn it on, enter their password, but then the screen went completely black and they only could see and move the cursor. Ctrl alt delete didn't do anything. I was able to make something appear with pressing shift a lot, the screen came on after a few seconds, but I wasn't sure if it was related. Someone else is now reporting the same thing. Any ideas how to fix?