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WU_E_METADATA_CONFIG_INVALID_BINARY_ENCODING
WU_E_METADATA_CONFIG_INVALID_BINARY_ENCODING means the Windows Update client received metadata-verification configuration whose binary representation could not be decoded. The failure occurs before a normal trust decision can be made.
What to check
- Determine whether the problem affects one update source or every Windows Update scan on the device.
- For WSUS or a private update catalog, verify that the server synchronization or publishing process completed without corruption.
- Do not edit metadata or certificate blobs manually; reacquire the configuration from the intended source and preserve the validation path.
Microsoft: Windows Update security
Microsoft: Windows Update log files
Microsoft: Windows Update error reference
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