Fix Windows Security 404 Not Found Permissions Issue - How to Stop Windows Defender from Causing SSL Certificate Errors-Postman Custom Certificate SSL Troubleshooting Guide

Updated 2026-06-13 16:08:52cloud-software
Fix Windows Security 404 Not Found Permissions Issue - How to Stop Windows Defender from Causing SSL Certificate Errors-Postman Custom Certificate SSL Troubleshooting Guide
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.