The key is provided to Microsoft when Windows 11 is activated, and Microsoft checks the key against its records. What Is a Windows Product Key?Ī product key is Microsoft's way to ensuring that the copy of Windows being used is genuine. You can find the product key in use on your PC, which is particularly useful if you bought Windows yourself and need to reinstall it.
Windows 11 uses a product key to ensure your OS is genuine - in other words, not pirated.
