Sure, whatever. Hell, someone can take "Hello World!" and edit into an ICBM guidance control system. But I think most normal, reasonable people would not consider that a "modification of a program".
By the same token, it is utter nonsense to suggest that Windows can be disemboweled and made into something it's not. Do you grasp the "stuff" that's at various times been called OLE2, ActiveX, COM, and so forth? Do you understand that various components have various dependencies, and that to attempt to "surgically" rebuild the OS to some court's spec would result in a nightmare beyond comprehension -- and, a product no one would want? All at a cost no one would pay?