I've installed both the software in the CD and the software I downloaded from the downloads page on their website. The drivers for the volume scroll etc. are working, it's only the USB Audio driver that won't work. I've tried cleaning the temp, restoring to a restore point etc, same issue. Unable to get any sound so far. I don't have any modifications that would relate to the issue that I know of, and I was redirected here by the Logitech support people as I was able to install on another PC.
Help is much appreciated.