Is your Windows 10 also a Pro version or it is a Home version.
That looks a little too cheap for a Windows license. Legal one that is.
I agree with davidhk - if you have installed W10Home, you have to do things a little bit differently, to upgrade to Pro.
See here, start with step 5:
Upgrade Windows 10 Home to Windows 10 Pro - Windows 10 Forums
Please press Win Key + R to open the run dialog, run winver. Post a screenshot of the result window here.
Also right click on the start icon, select Command Prompt (Admin). In the command prompt window run:
Post the results here. Then we can help you more. Your results should look like:
Try installing that W7 first and see if it would activate. It' may be an OEM version.
It's the same windows 7 key I had before I upgraded, I used this key to activate my windows 7 pro
Then I upgraded for free to windows 10
NavyLCDR suggested - otherwise your guess is as good as mine.