Dependent on your bios /motherboard, you have 2 options.1..Open the machine . Find the Bios jumper.(look in manual for location). Set to clear. Wait for the specified time (usually a few minutes) and reset to normal. Restart machine.2 Assuming you have not already set a password. Open bios settings (Usually by pressing +holding DEL when the dos screen starts.Go through the bios to find Set defaults for BIOS. also set defaults for motherboard (if existing). This should allow you to set up a bios password . WORD OF WARNING. Ensure you earth yourself and / or buy an antistatic wriststrap before opening the machine.