hmm...i would usually say to reset the jumper or remove the battery, but its a laptop...so hmm....hmmm.....
This site might help you:
Basically its a list of set passwords by bios manufacturers in case something goes wrong, like a backdoor to get through the security.
Each bios manufactuer would have a different bios password configured and this site lists the main ones.
I dont think this is illegal. If it is, feel free to delete the link, and i'll be sorry. I'm sure its not though...
Hope this helps