Symptom:
GPUpdate /force doesn’t update the computer policy
Cause:
There are many, but in THIS case it was due to the registry.pol file needing to be renamed/removed.
Resolution:
Rename (or delete)
C:\Windows\System32\GroupPolicy\Machine\Registry.pol
Run Gpedit.msc as Adminstrator.
Under Administrative Templates change any setting and then change it back. This will recreate the Registry.pol file.
Run gpupdate /force from a DOS prompt and verify that both computer and user policies were successfully updated.