In order to fix the issue, you will need to reset the webcam settings to default. For this purpose, navigate to Start > Control Panel > Hardware and Sound > Device Manager and expand the Imaging Devices and Universal Serial Bus controllers lists. Locate your webcam driver, right-click on its icon and select Uninstall. After that, reboot your PC and reinstall the webcam files from the CD received when you purchased the device. If you no longer have the CD, download the latest drivers from the webcam developer's website.