Considering Win 8/8.1 isn't locked to one PC, it would be a pretty dirty move to lock it down like that.
I finally cracked. Decided to pull my SSD out of the darkness from under the bed and finally plug it in again. Just upgrading to W10 preview on it now to see what it's like for me. Is their a particular way to get the latest builds? (i.e. a link to go to or something?)
It seems to be upgrading to build 10074 ? Is that current?
Current build is 10130.
All you'll need to do is open windows update ( in pc settings) and set to fast ring to get latest builds quicker...