Didn't have any problems with my sound till I installed Windows 8 and now my sound in both OSX/8 are not working. It worked a short while after installing drivers in 8 then stopped working, booted to OSX and it worked. Now it's not working in OSX either. Looks like it's not showing up in the system profiler too? I have it hooked up with the audio out port in the back to Logictech speakers. Internal sound is not working either.