I have an AV receiver (Denon AVR-S930H) connected to my laptop through HDMI. When I first got the receiver a couple months ago, it worked fine. It still works with my laptop, but for some reason, when I go into playback devices, it shows my receiver 10 times, but only one of those devices actually will play back audio through the receiver. It has only started to be like that recently. For a while I thought I'd just try to live with it, but it's starting to get rather annoying, especially if I change my audio device and then have to go through and figure out which of the 10 devices is the one that actually works. Anyone have any ideas what might be causing that, and what I can do to remove the extra devices?