Sorry to hear that you are having trouble with facial recognition. Windows Hello facial recognition normally needs to be configured first under:
Settings > Accounts > Sign-in options > Facial recognition (Windows Hello)
Could you please check that section and let me know what you see there? In particular:
- Is Facial recognition (Windows Hello) available?
- Does it show Set up, or does it display an error such as “We couldn't find a camera compatible with Windows Hello Face”?
- Has facial recognition worked on this laptop before, or are you trying to set it up for the first time?
- What is the exact make and model of your laptop?
If Windows Hello Face has already been configured, you normally do not need to manually open a camera box when starting the computer; Windows should attempt facial recognition from the sign-in screen. You can also select Sign-in options on that screen to check whether the face-recognition option is available.