MS is only the operating system. In todays world you can eithr build one yourself , have one built or by a prebuilt system. The issues most people run into with PC vs Apple is that many companies who make prebuilt systems use cheap parts to bring more options. And many Custom systems out there cost more for better quality. I myself build systems for OC Races and I can tell you it makes a huge diffrence between crap and soildstate componets. MS has nothing to do with the system other than supporting vendors of hardware and the drivers these 3rd parties come up with. just another track for your record thats skipping