OK, I think I've read a few threads with the same problem but people were using different OS. Here is my problem, I'm getting the same message "ultra100 bios not installed because no drives attached" but i'm using Windows XP Pro. It all started the other day, my computer was working fine than when I woke up the next morning it appeared my power supply died. To make a long story short I replaced the powere supply and connected all the plugs back to their rightful place but now I'm getting this annoying message about the Ultra100TX2 BIOS. Basically I get the message then it goes to another screen and does not move from there!!!! Any help would be appreciated.