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WU_E_SIH_VERIFY_DOWNLOAD_ENGINE
WU_E_SIH_VERIFY_DOWNLOAD_ENGINE means the Server-Initiated Healing (SIH) client downloaded a servicing-engine package but its verification failed. Microsoft documents SIH client events for its scan, download, and task execution stages.
What to check
- Use the SIH and Windows Update diagnostic events to identify the engine version and the first verification failure.
- Treat the content as untrusted until verification succeeds; do not replace the engine package manually.
- Check the update source path, content integrity, and any earlier network or certificate-related error.
Microsoft: SIH client diagnostic event fields
Microsoft: Windows Update log files
Microsoft: Windows Update error reference
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