Issue
Windows was activated but is now in a deactivated state.
Cause
Windows instances use Microsoft's KMS (Key Management System) provided by AWS for activation. If the instance cannot connect to the KMS server, a Windows activation error message may appear. There may also be an issue with the KMS client configuration.
Solution
Use Systems Management Automation documentation to activate Windows
Manual Windows activation
For detailed instructions, refer to the document below
https://aws.amazon.com/ko/premiumsupport/knowledge-center/windows-activation-fails/
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