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WINBIO_E_SAS_ENABLED
WINBIO_E_SAS_ENABLED means the sign-in flow is constrained by the Windows secure attention sequence requirement. The result belongs to an authentication/logon scenario; it does not say that biometric matching failed or that the sensor rejected the sample.
Keep the Windows logon boundary intact
- Record whether the operation is part of credential-provider, logon, or fast-user-switch processing rather than an ordinary application verification.
- Do not attempt to synthesize or bypass Ctrl+Alt+Del from a biometric client application.
- Compare behavior with the effective interactive-logon security policy and with the standard Windows sign-in UI.
Credential providers integrate with Winlogon and collect credentials for Windows authentication. A secure attention sequence requirement is intentionally enforced at that boundary so the user enters the trusted logon path before credentials are collected. Troubleshooting should therefore focus on sign-in policy and invocation context, not on capture quality, template deletion, or sensor calibration.
Credential providers in Windows · Windows Biometric Framework overview
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