I need to file a support request to Microsoft, and will need my Product ID (PID) for this.
Annoyingly, the official knowledge base does not contain an answer to Windows 8 users on where to find this.
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To find the PID, you need to go to your
System page, which can be done by one of three ways:
Control Panel\All Control Panel Items\System by copy-pasting this into the “address bar” of an Explorer window.
Press Win + X and click on
Control Panel. After this, go to
Use the desktop Charm to go to
Control Panel. Go to
Or do as @avirk and press Win + Break/Pause.
In here, you will find the information you need at the bottom: