Fix 7-Zip 'Cannot Open File' Error When Repairing Archives - Microsoft Store 0x80073cf3: Service Unavailable Fixes-Windows Defender Real-Time Protection Keeps Turning Off

Updated 2026-06-13 16:21:27windows-fixes
Fix 7-Zip 'Cannot Open File' Error When Repairing Archives - Microsoft Store 0x80073cf3: Service Unavailable Fixes-Windows Defender Real-Time Protection Keeps Turning Off
Before changing system settings, save your work and note the exact error text so you can compare results after each step.

Extra verification checklist

  • Restart the affected app after changing permissions or configuration files.
  • Test the same workflow in a clean browser profile or a temporary user account.
  • Compare the result on another network if the error may be connection related.