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| WU_E_PT_ECP_INVALID_FILE_FORMAT | WU_E_PT_ECP_FAILURE_TO_EXTRACT_DIGEST |
WU_E_PT_ECP_INVALID_METADATA
WU_E_PT_ECP_INVALID_METADATA means the external CAB processor could read the file but found metadata that was invalid for Windows Update processing.
How to investigate
- Determine whether one CAB, one product, or every synchronization cycle is affected.
- Check nearby signature, digest, XML, and extraction errors before treating the metadata itself as the root cause.
- For a managed catalog, validate publication and synchronization instead of editing files on client computers.
Microsoft: Troubleshoot WSUS synchronization and import issues
Microsoft: Windows Update error reference
Microsoft: Windows Update log files
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