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Fix 'Security Module Not Found' in Windows Defender - Troubleshoot Windows Defender Startup Failure Due to Other AV-Troubleshooting Chrome Remote Debugging Port Conflicts

2026-06-15 14:17:10
Fix 'Security Module Not Found' in Windows Defender - Troubleshoot Windows Defender Startup Failure Due to Other AV-Troubleshooting Chrome Remote Debugging Port Conflicts

Result check

  • Keep one change per test run so you know which step helped.
  • Undo temporary changes after the issue is confirmed.