Windows 8.1 does not boot. He's stuck on the screen "preparing auto repair" for over 12 hours! The point keeps spinning, and nothing happens. I can not access the bios, 12 hours ago I tried several times to press ESC, F8, F10, F12, and the system simply does not respond. Simply jump to the windows loading screen. I have a hp pavilion dv6 notebook. My battery died yesterday. It is plugged into the power outlet.