One method is to enter 'wmic path SoftwareLicensingService get OA3xOriginalProductKey' in Command Prompt This article ...

Now run this file, and you will see your Windows product key. You can also find Windows Product Key using Command Prompt or PowerShell. If these methods do not work for you, you can also use some ...

Note: You can still use Windows without the key, but it'll have some annoying DRM features. Here's how to find your product key - as well as see if you have a digital license. Every PC has a ...