tijoe :
Chemz11 :
I'm gunna guess its your motherboard
would you have any information on a motherboard I am assuming that it would be an upgrade only because the desktop was manufactured in 2009
If you're gunna upgrade your motherboard you need a windows installation disk. The motherboard socket is LGA775. Sorry I didn't find any exact model. I don't think you need to reinstall windows if you find the exact motherboard identical to yours. Try opening it up and looking on the board for names and model.
The you don't have to reinstall windows is a guess.