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| WU_E_PT_ECP_INIT_FAILED | WU_E_PT_ECP_INVALID_METADATA |
WU_E_PT_ECP_INVALID_FILE_FORMAT
WU_E_PT_ECP_INVALID_FILE_FORMAT means the external CAB processor received a metadata file whose structure or format was invalid. This is a content-format problem, not a routine network timeout.
What to check
- Identify the exact file or CAB referenced in the preceding log entries.
- Verify that the source content was downloaded or synchronized completely and was not altered by a proxy, cache, or file copy.
- If the failure comes from WSUS or a private catalog, inspect server synchronization and content storage before retrying clients.
Microsoft: Troubleshoot WSUS synchronization and import issues
Microsoft: Windows Update log files
Microsoft: Windows Update error reference
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