Every admin has made an error while creating a group policy and blew up an important machine. Murphy’s law states that you will then be unable to get the policy to repeal itself on the machine. Well this handy little tip will save the day.
delete the following file while you are logged in a an administrator
C:\Windows\System32\GroupPolicy\Machine\Registry.Pol
Now reboot the machine and you will be footloose and GPO Free!