[xdude]

You have upgraded from Windows 7 home to Windows 7 Pro. So the Home Edition gone. Windows 10 will pick the current edition and it's key. Whatever the one Properties in My Computer shows you. I don't think Mother board has any connection to that. Key is part of the OS it's not on Hardware. But before you upgrade make sure to write down the serial and key if you don't have the original cover anymore. You will need it if you are going to do a fresh upgrade not on the previous one. If not then it shouldn't be a problem. Installer should pick the one already in there.

Hmm second thoughts if you are doing to do a fresh installation. There are conflicting info about it. Also I found this which you might want to read,

https://answers.microsoft.com/en-us/wind...e32e85e645
https://www.bleepingcomputer.com/forums/...oduct-key/