No, I don't think that applies.
I've been wondering if it's confusing Win 7 with Win 10 and causing this error as all of the disks I've sent you work perfectly on my solo Win 7 laptop.
I'm unable to replicate your set up.
I think the best bet would be to perform a repair install on your Win 7 which won't affect your personal stuff or installed programs.
Boot into Win 7 - click on Computer - insert one of the Pro disks I've sent you and double click on its drive.
This will start the process and use the product key you got with the bought disk when prompted.
This can take 2hrs or so, so you will have to pick a time when you don't need to use your machine.