If you can't open the webcam, it means that some of its files are corrupted or missing. In order to fix the problems, go to Start > Control Panel > Uninstall a program, select the webcam software from the list, and press Uninstall. Next, right-click the Computer/My Computer icon, select Manage and open Device Manager. Expand the Universal Serial Bus controllers and Imaging devices lists, right-click the webcam driver, and then select Uninstall. Reboot the computer, run a registry cleaner from the database of Software Informer, and reinstall the webcam drivers and software.