I have a friend with a Toshiba Satelite I got them a couple of years ago. They let their 8 year old son use it and when he got it back it was asking for a password. I can't see how an 8 year old could of set a BIOS password as you have to press escape and then move to the password bit.
Anyway, I got aa dongle thing that plugs into the parallel port and resets it off ebay, works a treat.
Aaron