What matters about the motherboard is the drivers that you need to enable XP to communicate with the controlling components may not be available. This is becoming more prevalent with newer machines, especially laptops. If the computer is really troublesome running Vista then I would keep pressing Dell for a solution to those problems. I have just bought a new machine, not Dell, that came pre-installed with Vista and I am not greatly impressed with the O.S. but I am gradually getting it to work the way I want to. What I am not having are any problems with the computer, its just different.