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Fix OneDrive Sync Module Not Found Error 0x8004de40 - Windows Defender Sign-In Loop Fix for Windows 10-Chrome 429 Error: Causes and Fixes

Updated 2026-06-18 14:46:44cloud-software
Fix OneDrive Sync Module Not Found Error 0x8004de40 - Windows Defender Sign-In Loop Fix for Windows 10-Chrome 429 Error: Causes and Fixes
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.

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