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Fix Windows Update Connection Refused Due to Firewall - Troubleshooting Windows Defender Error 0x80070422-Windows 10 Python Module Missing: Troubleshooting Guide

Updated 2026-06-13 13:11:21windows-fixes
Fix Windows Update Connection Refused Due to Firewall - Troubleshooting Windows Defender Error 0x80070422-Windows 10 Python Module Missing: Troubleshooting Guide
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.