Fix 'Outlook Service Unavailable' After Disabling Firewall - Windows Defender Failed to Start: Manual Malware Check Guide-Fix Slow Docker Compose Build --no-cache

Updated 2026-06-14 10:34:34security-tools
Fix 'Outlook Service Unavailable' After Disabling Firewall - Windows Defender Failed to Start: Manual Malware Check Guide-Fix Slow Docker Compose Build --no-cache
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.