Key Viewer Programs Show Different Win 10 Product Key?

I downloaded & ran a program from majorgeeks.com called 'Easily Retrieve Your Windows Product Key' (Download Easily Retrieve Your Windows Product Key - MajorGeeks). The site administrator said he used it to successfully activate a clean Windows 10 install.

This program showed an entirely different key than the generic one I got using Belarc Advisor and Nirsoft ProduKey. (I did the upgrade to Win 10 Pro from Win 8.1 Pro.)

Out of curiosity, I downloaded another key viewer program called MSKeyViewer Plus. It showed the same key as the majorgeeks.com program. Apparently, this key is being pulled from within the Windows 10 Registry.

Could this be the actual individual Windows 10 Product Key?

I have seen the same thing happen with different product key viewers. I can't tell you why this is happening, but I can tell you the different non-generic key that I am seeing is the key that I had after upgrading from Windows 7 to Windows 10. The generic key VK7JG-NPHTM-C97JM-9MPGT-3V66T came back into the picture after I did a clean install of Windows 10.