Fix NET::ERR_CERT_AUTHORITY_INVALID in Chrome Safe Mode - Fix DNS Probe Finished NXDOMAIN Caused by Antivirus Blocking-Fix Windows Defender Real-Time Protection Stuck on Turning Off

Updated 2026-07-28 14:52:17security-tools
Fix NET::ERR_CERT_AUTHORITY_INVALID in Chrome Safe Mode - Fix DNS Probe Finished NXDOMAIN Caused by Antivirus Blocking-Fix Windows Defender Real-Time Protection Stuck on 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.