can you not get into the bios because it's password locked? (many people won't help you because with this, because you'd assume the system doesn't belong to you)
or are the settings not working?
in the bios, there's usually a setting to 'restore to defaults' or you can remove the battery (and unplug power) for 30 seconds ish, put the battery back in and power on
make sure you know what most settings should be though