How do I restrict a User's Logon hours in xp

[renne42]

i would like for the computer to shut off automatically for example i would like the computer to shut down at 10:00 every evening for all users

[Archangel122184]

If you are running a domain you can set user login hours and use group policies to force users to logoff when their time expires... other than that you'd have to set up a system event but that wouldn't restrcit users from rebooting the computer.