> but who's telling it? Is it a driver? And if so, can a driver be made that just doesn't do it? Yes, but then Microsoft haven't signed the driver, and it won'

> but who's telling it? Is it a driver? And if so, can a driver be made that just doesn't do it? Yes, but then Microsoft haven't signed the driver, and it won't have the correct hardware root of trust to decode the key, so it will fail and the service will fallback to a less secure mechanism which is why services will normally limit the resolution of the content delivered via those mechanisms to 720p or less.