If you’re still rocking an earlier version of Windows, it is becoming more and more difficult to stop your PC from upgrading to Windows 10. If for whatever reason you want to maintain your Windows 7 or 8, you’ll want to take a look at this article from ZDNet.
From the article:
I blogged just recently that Microsoft seemingly was clarifying its murky Windows 10 update process by adding an option to cancel the Windows 10 update to its dialog box prompt. Shortly after I wrote that, it came to light that Microsoft also quietly had changed the behavior of that prompt by changing the behavior of clicking on the red X — which normally cancels an operation — to signifying acceptance of the Windows 10 update.