I will probably have to get a new OS. I notice, after reading some of these threads, that there can be some problems with Win 7 and the Super PC's. There is talk of having to use a clean HD before installing Win 7. If that is the case will Win 7 format and wipe the HD clean before installing OS. And is Windows XP still a good system. I am trying to decide which OS to go with. I was using XP but I think the CD disk has become corrupted. I also have the M2N-Sli deluxe version of the motherboard and PC with the EVGA video card. Antec case.