> You can't claim that until and unless Windows is released with source as free software, which will Never Ever Happen.

That would wouldn't change a thing even it happens. No one except Microsoft is going to be expert on 50 million lines of windows code and contribute meaningfully to it. Add to that contributor's licensing agreement, community behavior, sheer capacity to make API changes and get it accepted. It will be impossible to create alternate certified Windows distribution even if all source code was available.