In order to fix the issue, I suggest you update the webcam driver and software to the latest versions. Navigate to Dell Drivers and Downloads page, identify your computer model, select your operating system and download and install the latest webcam files. If you still have problems, press Windows + R key combination, type services.msc and click OK. Expand the Imaging devices list, right-click on the webcam driver and select Uninstall. After that, reboot your computer, press Scan for hardware changes icon from Device Manager and reinstall the drivers. If it doesn't help, use the contact information from the official web page to get in touch with the support team.
