Insofar as I know NO ONE is FORCED to upgrade to anything. As Andre da Costa very properly told all of you just click this link: http://www.askvg.com/how-to-disable-update-to-windows-8-1-for-free-notification-in-windows-8-store/ for more information.
Having said that, I must add that I have been using 8.1 for six months or so now and am delighted with it. Of course, I took the precaution of purchasing a new computer that came with 8.1 already installed.
I always do that when changing Operating Systems. It eliminates a good many problems right out of the gate.
But you could still be using Windows 3.0 if you liked. I'm sure no one at Microsoft would care.
Heck, you can still use a Remington Portable Typewriter and a Pocket Calculator if you want.
It's a free Cosmos.
It's become abundantly clear by now that the upgrade is being forced. There are too many reports--all telling the same story--for it to be otherwise. Why MS has been completely silent on this issue is anyone's guess, but it's a little bit late to claim that it's not happening.