About a week ago I started up my computer and got the blue screen with the msg "PAGE_FAULT_IN_NONPAGED_AREA." I followed the screen prompts and restarted in safe mode and selected to start computer from an earlier time that worked, and also uninstalled the last hardware I remember adding which was a camera. I then got the blue screen again with the new msg "IRQL_NOT_LESS_OR_EQUAL." It also said to enter the BIOS in safe mode and disable options such as (caching/shadowing.) Problem is, I cannot figure out how to get to the BIOS on this darn computer. I am pretty computer savvy and have been able to fix a lot of things in the past but I have tried everything to get to the BIOS and cannot find it. I am using a Dell Optiplex GX280 with Windows XP Professional. I read that sometimes the BIOS can be hidden on these models. Any help would be appreciated!