Microsoft seems to be setting all their defaults to "screw the user". This isn't good. Distributing Windows 10 as a drive-by install that takes over your machine and turns it into a spamming node is really sleazy.
Microsoft is giving away Windows 10. That's a huge problem. It's not a compelling product they can get people to pay for, unlike all previous versions of Windows. Microsoft, for the first time, has to claw its revenue out of the user some other way.
For decades, Microsoft has been hard on their competitors and hardware suppliers, and they've had antitrust problems. But Microsoft didn't usually apply pain to their users, who were their primary customers. With Windows 10, that all changes. Windows users, you are no longer the customer. You are the product.
This may not end well for Microsoft, because most of their revenue is in the B2B space. Business customers don't like being the product.