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WU_E_PT_ECP_SUCCEEDED_WITH_ERRORS
WU_E_PT_ECP_SUCCEEDED_WITH_ERRORS is a partial-success result from the external CAB processor. The CAB processing operation completed, but warnings or subordinate failures were recorded and should be reviewed before trusting the result.
What to check
- Search backward in the log for the specific CAB entry, digest, extraction, or metadata warning.
- Determine whether the affected CAB belongs to one update source or a broader WSUS synchronization problem.
- Reacquire the original content if integrity errors are present; do not manually modify cabinet contents.
Microsoft: Windows Update log files
Microsoft: Troubleshoot WSUS synchronization and import issues
Microsoft: Windows Update error reference
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