Reseting Policies on workstation disconected from AD

I am looking for a way to reset restrictive policies applied to a workstation that can no longer access the AD. IE: a user get a virus warning message the workstation gets disconnected from the network but when we try to login locally whit admin accounts we have the same restriction as the user. No run no access to mmc or regedit, command prompt. I know their is a way to reset these policies until we reconnect to the network but I cannot remember how I use to do this. Any help would be greatly appreciated.