I've installed a Logitech Webcam C510 USB device on my Windows 7 desktop. I would like to disable the built-in microphone, but no software came with the webcam. In Windows Device Manager, the device appears under Sound and Video Controllers, and I disabled it. After rebooting, the webcam still works as a video capture device, but I don't know whether the microphone is disabled. Articles online suggest that the microphone can be selectively disabled with Logitech software, but I don't see any downloads on the Logitech website which appear to offer that option. Please advise.