You receive this message, because your webcam is not recognized by your computer or by ECAP software. In order to fix the issue, right-click the My Computer/Computer icon, select Manage and open Device Manager. Expand the Imaging devices and Universal Serial Bus controllers lists, right-click on the webcam driver and select Uninstall. Reboot your computer, connect the webcam, press Scan for hardware changes icon from Device Manager and reinstall the drivers. If the problem persists, try using another webcam capture utility from Software Informer database. Many of them are free of charge and fully compatible with all major webcam models.