Computer locking mechanism?

[TheSpreader]

As I stated the other day, my son is getting all this crap in his head and just out of curiousity I went through the history and didn't like what I found. I don't want him using the computer without me around and somehow he knows how to bypass my login password. He's smart for a 9 year old!

Is there something I can purchase that will lock the computer? I did a Google search but the only thing I can find are the locking devices that protect from theft and not what I'm looking for. Any advice will be appreciated.

Thanks!

[Ice]

[TheSpreader]

Well...now there's an idea.

[minusonebit]

See, now if he can still get at the computer after that, you can put him to use in other ways... there is a market for people who can open safes. hehe

[The Captain]

wait he can get around your windows xp login and pass, but he cant delete his history!!!!?!

[Sosa]

put on a bios password and always have the computer turned off if you are not using it.