Whoa! Nice graphics!
It seems that the video display adapter is doing something seriously wrong.
Did you perhaps change/add extra components/memory to the computer? Cover some heatsink? Had the cat explode various hairballs in the air ducts?
Did you change the harddisk or hear strange screeching noises coming from it?
I doubt your computer (a Dell DXP061 if i read correctly) is under warranty, since it was manufactured around the year 2006.
If nothing was added to the machine, i would suggest cleaning it with a little compressed air. Perhaps there is some dust clotting around the fans. Do the fans make an afwul lot of noise?
If all else fails, perhaps you could have it checked at with the aid of a qualified technician (or your brother's nephew cousins' former roommate who knows something about IT).
There is also, a newer bios available. If i read correctly you now have version 2.5.0, and there is a version 2.5.3 available. The 2.5.3 bios makes the network interface card more compatible, nothing else. But perhaps it also changed some serious error. I don't know.
Upgrading the bios to a malfunctioning computer CAN DESTROY IT FOREVER.