You can turn on the camera on your Windows computer immediately using the built-in Camera app, or another app that uses it.

Since the issue pertains to the Camera app, the first thing you should do to remediate this is to run the Camera troubleshooting utility. You will find the option for this in the Windows Settings.

Restart your computer. Plug your webcam into another available USB port. Check your webcam cable. The cable might be damaged. Test your webcam on another working computer. The above steps will let you ...