Your Windows 10 product key serves as proof that you actually own Windows 10, and might need to be entered when you reinstall or upgrade Windows.

Usually, you'd activate Windows 11 (or 10) using the Settings app to enter the product key. However, if you're in an enterprise environment and you have a specific type of activation key, you can also ...

A product key is a sequence of alphanumeric characters used to certify if the copy of a program or software is genuine. For example, Microsoft uses a 25-character alphanumeric key to identify the ...