If you are moving from Windows 10 Home to Pro, you don’t usually need to reinstall the OS. Go to > Update & Security > Activation . Select Change product key . Enter your new Windows upgrade license key. The system will "unlock" the new features and restart. Finding a Legitimate "Mate" for Your Windows Journey
Utilities that help you extract your current product key so you can use it during an upgrade, or tools that "match" your hardware with a compatible digital license.
The most direct (though often most expensive) way to buy a digital upgrade license that attaches directly to your Microsoft account. Avoiding Scams and "Gray Market" Keys