I've never seen a driver problem that would cause only 1 device to not be at least acknowledged in some fashion by the computer. The only times I have ever encountered the type of issue you are having is when I forgot to put a device into it's required USB mode. And when the actual USB cable itself was the culprit. If possible I would try plugging the camera into a different computer to check if it can at least see that a device is present. It might be as simple as replacing the USB cable.
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