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It's probably because of dual boot. Install 10 as the base OS and verify it's activated, then install 7 and use EasyBCD to set 7 as the main OS.Well that didn't work - downgraded to Windows 7 (using a new retail key) and when I reinstalled windows 10 (for dual boot) it asked for a key and wouldn't activate -..
when I put in my original windows 7 retail key windows 10 said it couldn't activate using that key
Grrrrr... hate windows 10
It's probably because of dual boot. Install 10 as the base OS and verify it's activated, then install 7 and use EasyBCD to set 7 as the main OS.