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.

Microsoft allows you to install Windows 10 or 11 without a product key. When asked for one during ... But what really happens ...

Your firewall might be blocking the Windows 10 activation Check your ... you will require a 25-character product key or a digital license to activate it. You won’t be able to activate it without ...

You can use Microsoft 365 Activation Troubleshooter to fix Microsoft 365 & Office subscription activation issues in Windows ...