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Windows Defender Port Already Allocated Fix Guide - Windows Defender Service Not Starting 404 Fix-How to Fix Windows Activation Token Expired Error

Updated 2026-06-13 14:34:27windows-fixes
Windows Defender Port Already Allocated Fix Guide - Windows Defender Service Not Starting 404 Fix-How to Fix Windows Activation Token Expired Error
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.