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Fix Windows Security Proxy Sync Issue - How to Fix OneDrive Bad Gateway 502-Fix Windows Defender Service Not Starting After Update

Updated 2026-06-14 14:38:47cloud-software
Fix Windows Security Proxy Sync Issue - How to Fix OneDrive Bad Gateway 502-Fix Windows Defender Service Not Starting After 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.