Hey guys. So I'm building a new PC. I have a spare Win 7 key I'm going to use for this build. My questions are: 1. If I install W7 without UEFI boot enable, then upgrade to W10. Can I do a clean W10 install afterwards and have W10 activate fine? 2. If I do a clean W10 install with a threshold 2 image (using my W7 key) and install a UEFI boot version. If I ever choose to go back to a "non UEFI boot" install, will my activation still be valid? Thanks!