I am trying to install Ubuntu 12. 04 server on my old 2002 HP 268900-999 desktop. I made a start up USB using the live disk creator in Ubuntu 13. 10. I set the computer to boot to USB first in the BIOS but when I boot I get a Non-System Disk Error" or "Disk Error" Appears on Black Screen. The USB drive is the only USB device connected to the machine (apart from a keyboard and a mouse) and it works on a different computer, what am I doing wrong?