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Fix OneDrive Version Mismatch Error 0x8004de40 - Fix Microsoft Store Not Opening After Reset Settings-Fix Windows Defender Connection Refused via Group Policy

Updated 2026-06-14 14:45:00backup-recovery
Fix OneDrive Version Mismatch Error 0x8004de40 - Fix Microsoft Store Not Opening After Reset Settings-Fix Windows Defender Connection Refused via Group Policy
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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