A problem I've searched for everywhere. Typically the problem is solved by switching USB ports but, not for me. It's able to see that it's a Mixamp Pro, but unable to find drivers for it, and does not show in sound devices. I've tried all my ports (which have no problems with any other device I've plugged in), and I've tried 2 different mini USB cables, to no success. That potentially leaves the problem being the mixamp pro itself (which works very well on my ps4) or my OS (Windows 7; works for every other device I've tried). So I'm really at a standstill. I've tried deleting/uninstalling the mixamp itself, and reconnecting it a dozen times, to no avail, so I don't know what to do at this point. I'll leave a link to the image of the model I have.