as much as I hate to quote previous comment: "Anybody with a screwdriver can take the hard drive out, pop it into another box, and bypass whatever (BIOS/EFI) p

as much as I hate to quote previous comment: "Anybody with a screwdriver can take the hard drive out, pop it into another box, and bypass whatever (BIOS/EFI) password you've set up." if you really don't wan't somebody to have access to your system you need full disk encryption.