If you have laptop you might came across this problem. The camera stop working and you get the black screen or this screen error :
In some laptop like Lenove you have F8 function bottom which disable the camera, Just Press it with Fnc Key to turn it on
You can also try working with windows and lfind out if you have Privacy Mode option :
You can also try update the camera driver:
What works for me is to UN-install the camera driver (right click and choose uninstall)
This help me to :
Open “Device Manager” –> Find [COMPUTER NAME] –> “System devices” –> “System Interface Foundation V2 Device” –> right click, select the popup menu item “Uninstall Device”
Reboot the computer