Hi,
What you are observing is, unfortunately, expected behavior with Windows Hello Face today. Windows Hello is intentionally designed to prioritize biometric authentication and to keep the facial recognition process active until it either succeeds or times out. During this window, Windows does not expose a documented keyboard shortcut to cancel the face scan or immediately switch to PIN entry. This is not an oversight in configuration; it is a product design limitation.
From Microsoft’s security and usability model, the sign-in screen treats each authentication method as a discrete flow. When Face is active, it owns the input focus until it fails or the user explicitly selects another method through the on-screen “Sign-in options” control. Keyboard input is deliberately ignored during this phase to prevent accidental credential entry, shoulder-surfing risks, or automated input injection before the system transitions to a fallback method. That is why keys such as Esc, Enter, or Space have no effect and why the PIN field is not active until Face recognition exits or is manually switched.
At present, there is no supported way to type a PIN “in parallel” while face recognition is running, nor is there a hidden or configurable key combination to bypass Face immediately. Even accessibility features like Narrator and keyboard navigation cannot force a faster switch because the sign-in UI is locked to the active authentication provider. Your idea of allowing silent PIN entry during a face scan would require a fundamental change to how Windows Hello brokers credentials, and it is not something that can be enabled via registry, group policy, or third-party tools.
The only practical mitigations available today are behavioral rather than technical. You can disable Windows Hello Face entirely and rely on PIN or fingerprint if available, or you can position lighting so Face recognition consistently succeeds. Some users choose to disable Face on devices frequently used in low-light environments and re-enable it later, but that is understandably inconvenient.
If you want this to change, the correct path is to submit feedback through the Feedback Hub under “Accounts > Sign-in options > Windows Hello,” explicitly describing the ergonomics and accessibility impact in low-light or obstructed-camera scenarios. Microsoft does monitor those submissions for design changes, especially when framed around accessibility and efficiency rather than convenience alone.