Reactivating Windows after a hardware change - Microsoft Support
https://support.microsoft.com/en-us/windows/reactivating-windows-after-a-hardware-change-2c0e962a-f04c-145b-6ead-fb3fc72b6665
WebSelect the Start button, then select Settings > System > Activation . Open Activation settings. If you're not activated, complete the activation process with the steps you see on the Activation page. If you experience an error while activating, see Get help with Windows activation errors.
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