Fix Windows Security Antivirus Not Turning On - Troubleshoot Windows Search Authentication Failed in Windows 11-FFmpeg Permission Denied Troubleshooting Ubuntu

Updated 2026-06-13 15:27:56cloud-software
Fix Windows Security Antivirus Not Turning On - Troubleshoot Windows Search Authentication Failed in Windows 11-FFmpeg Permission Denied Troubleshooting Ubuntu
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.