I just finished reinstalling windows 8 and upon completion after the reboot the system rebooted a second time than prompted and Error saying "windows encountered and unexpected shutdown and cannot proceed please reinstall windows" I found a fix by going into Regedit and changing a registry value i could get passed that screen. the first time it went to the log in screen and when i clicked to log in it rebooted..... than did that over and over till the system said "You PC could not be shutdown properly" Than gave me various things to try. I tried debugging... but it just cycled booting repeatedly till i hit the power button and stopped it cause it would just get passed bios screen before rebooting again.