If you bought an OEM key a few extra steps are required to upgrade Windows 10 Home to Pro
- Use the start button then go to settings.
- Choose System and then all to the bottom and choose change product key.
- Enter the Product key VK7JG-NPHTM-C97JM-9MPGT-3V66T
- The PC will reboot and should be running Pro now.
- Enter your own OEM product key to activate Windows.