Find your Windows product key
support.microsoft.com › en-us › windowsA Windows product key is a 25-character code used to activate Windows. It looks like this: PRODUCT KEY: XXXXX-XXXXX-XXXXX-XXXXX-XXXXX. Locate your product key for Windows 10 or Windows 11. Depending on how you got your copy of Windows 10 or Windows 11, you'll need either a 25-character product key or a digital license to activate it.
Activate Windows - support.microsoft.com
support.microsoft.com › en-us › windowsTo activate Windows, you need a digital license or a product key. If you're ready to activate, select Open Activation in Settings . Click Change product key to enter a Windows product key. If Windows was previously activated on your device, your copy of Windows 10 or Windows 11 should be activated automatically. Learn more about activating Windows. Open Activation in Settings.