Here comes a real softball for your sysadmins from a lowly programmer:
We have a machine with Terminal Services enabled so our clients can preview the next version of our product. I want to turn off Terminal Services for our users while I remote into the machine and perform an upgrade.
How do I turn off Terminal Services access for all users except Administrator? (I'm using Windows Server 2003.)
Bonus: Is there a way I can leave a polite rejection message if they try to connect while I'm performing the upgrade?