HRESULT 0x8024800A (WU_E_DS_UNKNOWNHANDLER): meaning and diagnosis

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Description:

The update could not be processed because its required handler was not recognized by the data store.

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WU_E_DS_MISSINGREF	WU_E_DS_CANTDELETE

WU_E_DS_UNKNOWNHANDLER

WU_E_DS_UNKNOWNHANDLER means the update was recorded in the data store, but Windows Update could not recognize the handler needed to process it. The issue can involve unsupported metadata, an incomplete agent state, or a package that does not match the local servicing components.

What to verify

Identify the exact update and handler named before the error.
Check whether the client is current enough to process the offered update content.
In a managed environment, verify that the update source has synchronized correct metadata for the target Windows version.

Microsoft: Windows Update log files

Microsoft: Windows Update issues troubleshooting

Microsoft: Windows Update error reference

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