BleepingComputer.com: Limit user access

When at work, I log onto my computer and can only open certain programs. I cannot access files and folders, and have restricted access to the web. I cannot even change any settings for the display, such as resolution. Everything is locked down that I am not allowed to use.

How can I put the same thing at home? On 2 family computers, my son (under 6) messes with anything he can get into. He has even gotten into the bios, despite me having a password. He changes settings, adds shortcuts to things, and goes to websites he shouldn't. I discovered that when he asks what letters make a certain sound, it means he is trying to spell it to find the website. not porn or anything, just places he shouldn't be. I tried net nanny, but couldn't figure out how to limit just him and not me. I already have his login as a limited user, but that doesn't seem to restrict enough.

Any suggestions? I run win XP with SP3

Generally you use the GROUP POLICY EDITOR to set restrictions on a computer:

http://support.microsoft.com/kb/307882

Jeff