I'm thinking that if you buy a Windows 10 key or "upgrade" a Windows 8/8.1 key, you could just change the key in Windows to a "full" key and re-activate, rather than re-installing.If you install Windows 10 Insider Preview, on release would you then have to install 8.1 again to then upgrade to 10 again?
Just in case that's not going to happen, I'm preparing to do a full wipe and install on release of Windows 10.
![Big Grin :D :D](/styles/default/xenforo/vbSmilies/Normal/biggrin.gif)