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WU_E_INVALID_EVENT_PAYLOAD
WU_E_INVALID_EVENT_PAYLOAD means a Windows Update component rejected the contents of an event payload. It usually affects reporting or telemetry-style event processing rather than the update binary itself.
For managed environments and API users
- Capture the event name and the first parsing or validation message before this HRESULT.
- Check whether a custom management, reporting, or update service integration is constructing the payload.
- Treat the payload as structured data: validate required fields and encoding rather than retrying an unchanged request.
Microsoft: Windows Update log files
Microsoft: Windows Update error reference
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