What does HRESULT 0x8009803F (WINBIO_E_SESSION_HANDLE_CLOSED) mean?

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the biometric session handle has already been closed and can no longer own operations or callbacks.

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WINBIO_E_INCORRECT_SESSION_TYPE	WINBIO_E_DEADLOCK_DETECTED

WINBIO_E_SESSION_HANDLE_CLOSED

WINBIO_E_SESSION_HANDLE_CLOSED is a lifetime error: code is using a WinBio session after the close path has run. This is especially easy to expose with asynchronous sessions because completion notifications and cancellation can overlap application shutdown logic.

Serialize session teardown

Give one component ownership of WinBioCloseSession and make repeated close requests observable in logs.
Stop issuing new operations before teardown and use WinBioWait when the session model requires pending operations to complete or cancel.
Ensure callbacks do not re-enter code that schedules work on a handle already marked closed by another thread.

Microsoft documents different close behavior for synchronous and asynchronous handles; asynchronous close itself completes through the configured notification path. Therefore, “close requested” and “session no longer usable” must be represented carefully in application state. Reopening a session may hide the race temporarily but does not fix duplicate ownership of the old handle.

WinBioCloseSession · WinBioWait

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