zhizhu
Home / office-tools / Fix Windows Defender Update Error 0x80240022 - How to Resolve DNS Error in Windows Security-Fix Ubuntu APT Update GPG Error: No Public Key

Fix Windows Defender Update Error 0x80240022 - How to Resolve DNS Error in Windows Security-Fix Ubuntu APT Update GPG Error: No Public Key

2026-06-13 16:59:40office-tools
Fix Windows Defender Update Error 0x80240022 - How to Resolve DNS Error in Windows Security-Fix Ubuntu APT Update GPG Error: No Public Key

Final checklist

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