Sometimes you are slaving away trying to work out why you're getting Access Denied and then you realise that it's probably all the fault of Mordac, the preventor of information services, deploying a new security policy he's devised.
So today's command line is:
which gives you a verbose report of policy information applied to your machine.
"Intended for administrators, the Group Policy Results (GPResult.exe) command line tool verifies all policy settings in effect for a specific user or computer. Administrators can run GPResult on any remote computer within their scope of management. By default, GPResult returns settings in effect on the computer on which GPResult is run."