Hi, I have suggested a possible solution to stop the service and to restart.If you are having hardware failure or some system files have been deleted , then you could use the system restore.
Trying to help you without any loss. If your system is hanging in BSOD, that suggest hardware failure.
My solution is workable, provided your system has not have any other problem, than window updates.
Could you boot your computer in safe mode? If, you could do , then resort to SR.