If Camera access is on and the laptop camera is still not working, it might be that the app on which you are trying to access the camera is restricted. To allow access: ...

Gadgets How To Cut Off Access to Your Camera and Mic on Any Device Don't let apps spy on you—here's how to check and make changes.

通知や位置情報、カメラとマイクなど、どのアプリがどんなOS機能を使用（アクセス許可）しているのか、ここで確認することができます。

If your computer has the right hardware, accessing it using your face or your fingerprint can be more secure than traditional passwords.