When a system fault, error, or crash ends up freezing your operating system, you can bypass doing a complete reboot by opening Notepad and entering these lines into it:
Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contro l\CrashControl]
"AutoReboot"="1"
Save and name the file 'AutoReboot.reg' then double-click on the newly created file to enter it into the Registry. Now, reboot your computer for the changes to take effect.