Product keys are one of the ways software developers ... It also offers a security benchmark score, though sadly this is only available for Windows 7, Windows Vista and Windows XP Pro.

One method is to enter 'wmic path SoftwareLicensingService get OA3xOriginalProductKey' in Command Prompt This article explains a few different ways for how to find a Windows 10 product key.

Windows introduced Windows Genuine Advantage. This feature will check your computer’s product keys against thousands of blacklisted product keys. If yours is found wanting, the effect will be an ...