Fix 'Windows Remote Desktop Cannot Connect to This Computer' - Fix Windows Defender Blocked by Third-Party Antivirus-Cloudflare Origin Certificate Validation Failed: Troubleshooting

Updated 2026-07-28 05:39:48developer-tools
Fix 'Windows Remote Desktop Cannot Connect to This Computer' - Fix Windows Defender Blocked by Third-Party Antivirus-Cloudflare Origin Certificate Validation Failed: Troubleshooting
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.