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OneDrive Not Syncing After Update: Fixes That Work - Windows 0xc004c003 Activation Error Troubleshooting-Fix Windows Defender Authentication Failed After Update

Updated 2026-06-13 22:05:24windows-fixes
OneDrive Not Syncing After Update: Fixes That Work - Windows 0xc004c003 Activation Error Troubleshooting-Fix Windows Defender Authentication Failed After Update
Likely symptom
Likely cause
Safe rollback

Verification route

  • Repeat the original action, not only a simplified test case.
  • Restart the app or reload the service after configuration changes.