HRESULT 0x80240055 (WU_E_AU_CALL_CANCELLED): meaning and diagnosis

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Automatic Updates cancelled this operation because it applies to an update that is no longer applicable to this computer.

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WU_E_INTERACTIVE_CALL_CANCELLED	WU_E_SYSTEM_UNSUPPORTED

WU_E_AU_CALL_CANCELLED

WU_E_AU_CALL_CANCELLED means Automatic Updates stopped the request because the target update is no longer applicable. This may happen when update state changes between detection and action.

What to do

Start a fresh scan and work from the current set of applicable updates.
Check for a superseding package, a completed prerequisite, or a changed system configuration.
In managed deployments, avoid holding an update selection for a long time before installation.

Applicability can change after detection

Windows Update selection is not a permanent promise that the same revision will remain installable. The protocol synchronizes update metadata and WUA evaluates applicability against the current device state; a prerequisite, superseding revision, driver match, or other detection input can change between a scan and a later Automatic Updates action. That is why this status should be handled by obtaining a current search result rather than forcing the stale update object through installation.

For automation, log the update identity and revision from the cancelled operation, then compare them with a new search. If the update disappears from the applicable set, the cancellation is consistent with changed detection state; if it remains applicable, the surrounding Windows Update events are needed to identify why Automatic Updates abandoned the call.

References

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