Upgrade to Windows 10 Professional installs Enterprise

1. Open the Settings app and click Update & Security.
2. Open Activation and click Change product key.
3. Enter your Windows 10 Professional product key and click Next.
4. Restart the computer after the new product key is activated.

You can force a downgrade with the default product key (VK7JG-NPHTM-C97JM-9MPGT-3V66T) of Windows 10 Professional.