We will see, Ms have done too many u-turns.
Since I have already installed windows 10, my 8.1 is linked to it so I can install 10 after the free offer if I want to. My windows 8 is a retail version, not a OEM.
Also a link to tell you how to get Windows 10 for free after the 29th.July.
Desktop machine now powered by windows 8.1 pro 64bit, no dreaded metro, laptop by Linux