Quote:Your webcam may not work on Windows 10 for several reasons. The usual troubleshooting steps apply, but Windows 10 has a new system-wide option that completely disables your webcam in all applications.

Check Windows 10 Camera Options

On Windows 10, the Settings app has a few switches that disable your webcam in all applications. If you disable your webcam here, even desktop applications won’t be able to use it.

This is a little confusing. In general, the app permissions options under Settings > Privacy mostly affect new Windows 10 apps from the Store, also known as UWP apps. But the webcam options also affect desktop apps.

If your webcam isn’t working, head to Settings > Privacy > Camera.

Full reading: https://www.howtogeek.com/394677/fix-my-webcam-doesn%e2%80%99t-work-on-windows-10/