Common issues with where to purchase windows 10 pro include errors during activation or key mismatches. Ensure your key is entered correctly and matches the edition you’re trying to activate. If problems persist, use the Windows Activation Troubleshooter found in Settings > Update & Security > Activation, or contact Microsoft Support for help.
Troubleshooting Windows 10 Pro Activation Issues
To use the troubleshooter, select start, settings, update and security activation and then select troubleshoot.