Does your Anti Virus program have a parental control built into it?
It might be only on the internet security suite type of programs.
I know my Zone Alarm has it. { internet security suite & the extreme both do}
If you know how to set start up & shut down in the BIOS you can do it that way. but kid could just do a manual restart unless you also lock it somehow - I've never looked into that part of it in BIOS , but I'm sure it's possible.
here's a listing of parental control programs from cnet -
http://download.cnet.com/windows/par...g=ltcol;narrow