If its limited to MS services and MS games, then sure, whatever. But if they become the "ethical authority" of my personal files? Fuck that. How do we even know that they can accurately identify the "bad" software anyways?
There are many grey areas, if you own the physical copy then you're allowed to download certain things and so on, but MS will never know that. Sounds really shady.
Again though, if they search for and disable fake windows copies for example, I'm fine with that. They kinda do that now anyways.








