I just got a reconditioned Dell Dimension 4500. I installed Ubuntu 12.04 as the only operating system and now if I try to access the BIOS, I get an error saying
utilities partition not found. What do I do?
You probably erased the system utilities and backup partition, which it probably uses to modify the BIOS settings in a nice, graphical way. You'll need to contact the manufacturer for recovery CDs and/or a method of restoring the utilities partition.