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Fixing Windows Security Connection Timeout Error 0x800705b4 - Windows Defender Missing After Update Fix-Solve Microsoft Store 404 Issue in Windows 10/11

Updated 2026-06-14 02:50:42developer-tools
Fixing Windows Security Connection Timeout Error 0x800705b4 - Windows Defender Missing After Update Fix-Solve Microsoft Store 404 Issue in Windows 10/11
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.