right. I had to sort my computer out with the same issue except I was using optical cables. I'm on an XP laptop right now so I'll try and remember the steps I took. It was fixed in less than a minute. Go to your control panel and look for the audio section. There should be an output section on that page. There will be a menu that comes down listing different methods for output like usb devices, hdmi, optical audio and so on. I clicked on the appropriate one and it was sorted. If you don't see what you need, don't start clicking random items, I don't want to be responsible for screwing your computer up.