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Fix Windows Defender Version Mismatch Sync Errors - Fix Microsoft Store Invalid Configuration Error-Troubleshoot Windows Security Sync Error 502

Updated 2026-06-13 19:20:45browser-issues
Fix Windows Defender Version Mismatch Sync Errors - Fix Microsoft Store Invalid Configuration Error-Troubleshoot Windows Security Sync Error 502
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.