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WU_E_DM_READRANGEFAILED
WU_E_DM_READRANGEFAILED indicates that the download manager could not retrieve the part of the local payload it expected. Treat it as a local content availability or integrity problem until the earlier error identifies the cause.
How to investigate
- Check for previous BITS transfer failures, disk errors, incomplete downloads, or unexpected cache cleanup.
- For managed infrastructure, verify that a retried download receives a consistent content response.
- Retry through Windows Update after resolving the condition; do not force installation from a partial file.
Microsoft: Windows Update error reference
Microsoft: Windows Update log files
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