When an upgrade utility or the built-in Windows Update service processes an OS transition, it replaces the underlying registry keys and activation tokens. The system status updates to reflect that the old key or generic installation key has been migrated into a permanent digital license. Common Scenarios for License Updates
When your license key is updated during a valid upgrade, your previous qualifying license (like a Windows 7, 8, or older Windows 10 key) is consumed by the activation server. It grants a digital entitlement for the new version. Your original key is essentially transformed into a digital permission slip for your current OS. Common Upgrade Paths and Activation Behaviors windows upgrade mate license key updated
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