Fix OneDrive Error 0x8004de40: Sign-In Issues - Windows Defender Network Error Fix: Step-by-Step Checklist-Windows 10 Search Sign-In Loop Fix

Updated 2026-06-14 12:12:51developer-tools
Fix OneDrive Error 0x8004de40: Sign-In Issues - Windows Defender Network Error Fix: Step-by-Step Checklist-Windows 10 Search Sign-In Loop Fix
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.