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WU_E_METADATA_TIMESTAMP_TOKEN_VALIDITYWINDOW_UNEXPECTED
WU_E_METADATA_TIMESTAMP_TOKEN_VALIDITYWINDOW_UNEXPECTED is a catch-all failure while Windows Update evaluates the validity window of a timestamp token. A more specific time, certificate, or configuration error may appear earlier in the same trace.
What to do
- Generate a fresh readable update log and correlate this code with the first preceding metadata-verification event.
- Verify accurate system time and the update source response before repairing any local cache.
- For managed services, compare the failing client with a working client that uses the same policy and update server.
Microsoft: Get-WindowsUpdateLog
Microsoft: Windows Update security
Microsoft: Windows Update error reference
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