1. Release a version of Windows that everybody likes.
2. Release a version of Windows that everybody hates.
3. Drop support for the OS everybody likes so they have to buy the one everybody hates.
5. Go to 1.
Microsoft sells licenses. If they didn't force you to upgrade to the Shitty Windows you'd just stay on the one you like. Once they've forced everyone onto the Shitty Windows, they release the Good Windows because of course you want the Good Windows and you'll rush to buy it.
Isn't that illegal, you say?
Isn't that extortion, you say?
Guess which operating system the US government's computers run.