I can't see a copyright issue if new drivers were brand new code. The trouble's always been MS has deliberately denied providing new drivers for newer hardware as deliberate means of obsoleting its older versions.

Using older versions of Windows (such as Win 7) on new hardware is a highly desirable idea for those of us who are mightily pissed off that Microsoft has essentially converted is Windows platform from an operating system to a spyware and advertising platform. New drivers would solve the problem.