Turned on my desktop this morning like normal. It went to Windows 7 Updates. It has been updating for the past 3 hrs, but never gets past 13 percent. It never showed X of X updating. The message on screen is " Configuring Windows Update. 13 percent complete. Do not turn off you computer." Is this some kind of virus. I tried force shutdown of computer and re-booting in safe mode. But it won't let me reboot in safe mode... The keyboard and mouse don't come on line to use until after the update screen comes on. ?????