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Fix npm EACCES Error: Permission Denied on node_modules - Windows Defender 502 Bad Gateway: Troubleshooting Checklist-How to Fix Windows Defender Startup Configuration Error

Updated 2026-06-13 13:00:38developer-tools
Fix npm EACCES Error: Permission Denied on node_modules - Windows Defender 502 Bad Gateway: Troubleshooting Checklist-How to Fix Windows Defender Startup Configuration 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.

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