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

You can create a guest account on a Windows 10 computer by using the Command Prompt feature. Here's what you'll need to do.

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 ...