zhizhu
Home / windows-fixes / Fix Windows Defender 502 Bad Gateway Error: Configuration Guide - How to Fix Windows Defender Version Mismatch on Windows 10-Fix Windows Update Service Stuck on Starting Repair

Fix Windows Defender 502 Bad Gateway Error: Configuration Guide - How to Fix Windows Defender Version Mismatch on Windows 10-Fix Windows Update Service Stuck on Starting Repair

Updated 2026-06-13 14:01:53windows-fixes
Fix Windows Defender 502 Bad Gateway Error: Configuration Guide - How to Fix Windows Defender Version Mismatch on Windows 10-Fix Windows Update Service Stuck on Starting Repair
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.