Reset Local Group Policy Objects to default settings

1. First, click on Start, Run and then type in CMD. Now copy and paste the following command into the window:
   secedit /configure /cfg %windir%\repair\secsetup.inf /db secsetup.sdb /verbose
   
   If you are running Windows Vista or above and need to reset the security settings to their default values, use this command instead:
   secedit /configure /cfg %windir%\inf\defltbase.inf /db defltbase.sdb /verbose
   
2. Delete the registry.pol file if it exists:
   del c:\windows\system32\grouppolicy\machine\registry.pol
   
3. Reboot