New
#11
Change product key to the Windows 10 generic Pro product key:
VK7JG-NPHTM-C97JM-9MPGT-3V66T
Once the upgrade to Pro finishes, change product key again to your purchased Windows 10 Pro product key. You can't do an upgrade with an OEM product key.
The product key in the computer's UEFI is blocking the installation of Windows 10 Pro. The solution is to put the Windows 10 Pro product key in a PID.txt file, save it to the \sources folder of the Windows 10 installation USB flash drive and that will override the Windows 10 Home product key stored in UEFI.