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WU_E_DM_INCORRECTFILEHASH
WU_E_DM_INCORRECTFILEHASH indicates that Windows Update could not validate the file digest associated with a payload. Treat it as an integrity or metadata mismatch and retain the first related log entry.
How to investigate
- Retry the download only after confirming that the update service is serving the expected revision of the content.
- For WSUS or an intermediary cache, check whether the content file, metadata, or proxy cache is stale or inconsistent.
- Do not bypass signature or hash verification; identify why the expected digest and delivered payload differ.
Microsoft: Windows Update error reference
Microsoft: Windows Update log files
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