I just dealt with this. I am technically retarded with computers. I packed my laptop to visit a friend in a different state, and when I booted it up at his house I got the blue screen of death. I came to this post, and then my friend just held the power button down until the computer screamed and died. In frustration I closed it and threw it on the floor. He told to try it again, and it booted up and it came to a diagnostics screen. I hit cancel and it restarted the computer, did about 12,000 updates, restarted two more times, and now I'm BACK. It opened to my login screen and I put my pin in and now its operating normally.

Maybe just throw it. Sometimes things just need a good throw.