New
#31
If you purchased Win8/8.1 to upgrade win7 - reinstall win7 on your PC and upgrade it to win 10
Since you purchased win8/8.1 you can now transfer the key to another non-free-upgradable PC
then update that to win10 also
I see no reason to supercede a windows 8/8.1 product key to windows 10 > on a machine (PC) that already had windows 7 installed
Save your retail windows 8/8.1 key (from being superceded to windows 10 on that PC) and use it (transfer it) where it can be better used