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Fix Windows Defender Version Mismatch Sync Errors - Troubleshooting Chrome Connection Timeout and Access Denied-How to Resolve Windows Defender Error 0x80240034

Updated 2026-06-14 03:34:22browser-issues
Fix Windows Defender Version Mismatch Sync Errors - Troubleshooting Chrome Connection Timeout and Access Denied-How to Resolve Windows Defender Error 0x80240034
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.