The operating system should recognize the device and reinstall the drivers for it.
After the operating system has loaded, plug the device into the computer again. Select the device in the list, then right-click on the device and select Uninstall device. It should include the brand or model number of the webcam in the name of the device. 
Expand the Universal Serial Bus controllers section and look for the device in the device list. Uninstall any device related software on the computer. Uninstall and reinstall (Follow the steps below to uninstall and reinstall the device on your computer if Miscellaneous Troubleshooting does not resolve) If you can't hear sound from your speakers Windows 10 Additional Solutionsġ. If your built-in camera isn't working on your Mac If necessary, download the driver or device software directly from the manufacturer's website. Downloads from third party sites can often be bundled with malware and represent a security risk. Run software updates, device drivers in macOS are packaged with system updates so this will often resolve issue. You will be able to verify that the correct device(s) are recognized and set as the default. Verify audio input/output by going to System Preferences > Sound > input/output. (Zoom, Collaborate, Skype, etc.) For example close all other apps that could be using the camera, exit and try again. Other apps may have control of the device. Clear cache and cookies if the camera is being accessed by a web browser (this is much more common in Collaborate than Zoom, since Zoom isn't usually run in a browser.) If you have accidentally hit "deny" when the app asked them for device permission this should solve the problem. Restart the computer if you did not already do so in section 1. 
Restart the app trying to access the camera or mic, e.g. If the unplug and re-plug process did not work, continue to the next section. After the computer has restarted and loaded back into the operating system, plug the device into a USB port. 
Restart the computer with the device unplugged.
If unplugging and re-plugging does not work, unplug the device again. You may also want to try plugging the device into a different USB port than it was plugged into previously. Unplug the webcam from the computer, then plug it back into the computer. Plug/Unplug (This section doesn't apply to integrated peripherals, e.g.
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