I should give you some background why I am asking if there is a Compaq hidden Bios and if there is, how to access it. I have a 3 year old Compaq with the usual F10 setup nice GUI bios. Trouble is, some parts are missing from the bios. Like the CDROM and the USB ports. Someone asked on the Compaq forum about a hidden bios and they didn't answer so I am now wondering if this is were my missing information is. I have to assume that all the articles I read about being sure your devices are enabled in the bios (like the USB I am currently working on), have something to them. So does anyone know for sure there is or isn't a hidden bios and if not, how do I get to the USB and CDROM entries? If there isn't a hidden bios, what is the deal with USB and BUS Mastering (the only thing that could possibly be enabled that I can find that would have any control over USB)? Some devices I read require bus mastering to be disabled and I am now wondering what else will disappear when I tell the bios not to use it.