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Fix Port Already Allocated Error in Windows Security - Task Scheduler DNS Failure Troubleshooting-Error 0x80070643 Fix: Windows Activation Update

Updated 2026-06-13 20:31:49office-tools
Fix Port Already Allocated Error in Windows Security - Task Scheduler DNS Failure Troubleshooting-Error 0x80070643 Fix: Windows Activation Update
Likely symptom
Likely cause
Safe rollback

Verification route

  • Repeat the original action, not only a simplified test case.
  • Restart the app or reload the service after configuration changes.

More repair notes

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