About a year ago I build a PC and installed Windows Vista Home Premium on it. (Yes, I know...) I'm considering buying Windows 7 - probably the "home premium" version - as I can't see it being worse than Vista, but I was wondering how I can legally sell my full "clean install" Vista disc, license intact. Obviously, I would have to remove it from my PC, but do I need to do anything else to "de-register" it from my PC/my MAC address/my name?

Whether or not anyone would want to buy a copy of Vista is another matter...