Logging in to Windows with face recognition is a simple process. On the login UI, select "Face Recognition" as the 2nd authentication method:
Click the continue button or press Enter
If this is the first time you're using Face Recognition, and your FaceSense policy requires that a newly enrolled FaceSense must be activated first, then you will be promoted to activate your FaceSense:
Now, you will be asked to take a picture. Look at the camera, position your face in the middle of the frame
then click "I am Ready" to login