zhizhu
Home / windows-fixes / Fix Error 0x80070422 Windows Security Version Mismatch - Fix Windows Defender Not Starting After Update-Windows Update Failed: Backup Issues Checklist

Fix Error 0x80070422 Windows Security Version Mismatch - Fix Windows Defender Not Starting After Update-Windows Update Failed: Backup Issues Checklist

2026-06-13 17:00:23windows-fixes
Fix Error 0x80070422 Windows Security Version Mismatch - Fix Windows Defender Not Starting After Update-Windows Update Failed: Backup Issues Checklist

Final checklist

  • Confirm that the same symptom is gone after a restart or refresh.
  • Keep the smallest working change and undo temporary diagnostic settings.

More checklist guides

Fix 'ffmpeg command not found' in PHP exec()Conda Environment Setup Checklist: Get It Right the First TimeHow to Fix Go Modules Proxy Timeout ErrorFix Windows Update Error 0x8024402c (Proxy Settings)How to Fix Windows Defender Error 504 in 5 StepsHow to Fix Windows Defender Not Opening