One of my friend gave his old PC to fix it up. That is Compaq Professional Workstation 5100. Whenever I boot it up I receive 162 System Options Not Set. I searched and found that we need to go in to BIOS and save the settings once again and it will work fine. But that computer is not letting me to get in to BIOS. I know I have to use F10 key for BIOS. Any idea what to do?