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WU_E_METADATA_XML_VALIDITY_INVALID
WU_E_METADATA_XML_VALIDITY_INVALID means the metadata configuration contains an invalid timestamp-validity window. Timestamp validity is part of the evidence used to decide whether signed metadata remains acceptable.
What to verify
- Confirm that the update source is serving complete, current metadata and not an old or malformed cached response.
- Check the client clock and time synchronization, because time errors can complicate analysis even when the configuration is the primary fault.
- For internal update infrastructure, review the signing and timestamping configuration rather than changing client trust settings.
Microsoft: Windows Update security
Microsoft: Windows Update log files
Microsoft: Windows Update error reference
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