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Fix Windows Security Port Already Allocated Error - Resolve Windows Defender Error 0x800f0906-Fix Task Scheduler DNS Error During Setup

Updated 2026-06-14 05:18:41cloud-software
Fix Windows Security Port Already Allocated Error - Resolve Windows Defender Error 0x800f0906-Fix Task Scheduler DNS Error During Setup
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.