A product key gives Windows 11 the information it needs to verify that you rightfully paid for your copy of the operating system. It also activates Windows to give you access to all the features without any limits.

These days, your product key is usually tied to your Microsoft account and stored in your PC’s motherboard via “digital entitlement.” However, if you’re not using a Microsoft account on Windows 11, then you might want to note the physical key down.
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