When attempting to upgrade using the "VK7JG-NPHTM-C97JM-9MPGT-3V66T" key I see the "Upgrade your edition of Windows" screen, click start and then get one of 2 errors:
* "Unable to upgrade your edition - We can't upgrade your edition of Windows. Try upgrading your edition of Windows again. (0xc03f6506)"
* "Unable to upgrade your edition - We can't activate Windows on this device because you don't have a valid digital licence or product key. If you think you do have a valid licence or key, select Troubleshoot below. (0x803fa067)"
I have had my account validated several times since (including validating over the phone so my Windows 10 Home is definitely valid. I have also run "sfc /scannow" and "dism /Online /CheckHealth" to check that the install is ok.
As it stands I have a Windows 10 Pro licence key but haven't been able to even try to use it. Is there anything I can do to fix this?