The biggest problem is. A legal one. Since there is to the best of my knowledge no way to purchase a Win License without it being contractually tied to a device it's already installed on.

Then you have the legal hassle surrounding the DSP chips and the licenses for running them (if you want sound) In short, if I knew a way and were to tell you I would be breaking any number of laws. Don't know how so I can't break the law, but you get my point.