You can sign in to Windows using face recognition in place of entering the Windows password if you have already set the Windows password.
See Creating/Changing/Removing Your Windows Password for more information on the Windows password.
After the registration is complete, you can use face recognition on the sign-in screen or lock screen.
If multiple users share your VAIO computer or there is a possibility that any person other than you uses the computer, it is recommended that you enhance the security strength as follows in the FastAccess settings window:
Enhancing the security strength
Rejecting the recognition with a photo
If your VAIO computer fails to recognize your face, move your head so that the face is located in the center of the computer screen and a green frame is displayed.
If it takes time for face recognition, you can improve the face recognition rate by signing in to Windows with password entry while a green frame is displayed on the computer screen.