From an ethical point of view I completely agree that it's predatory, I just don't believe any EU laws exist that mean anyone would have a chance of success trying to sue over that, I don't believe it to be illegal. And while I'm not all-knowing, nor am I someone who knows every single relevant law like the back of my hand, my opinion is somewhat backed up by the fact that I'm not aware of anyone with actual legal knowledge having ever suggested this behaviour of Microsoft's could be considered illegal the way you want it to be, it's only ever people who are users who think it should be considered breach of contract. (And considering how much money it would be worth if you could sue MS for this and win, if it were even a 50/50 question you'd get lawyers trying.)