Yes, that's the page where I got the driver. I just reinstalled it and compared its driver version to the one Windows was automatically installing and noticed the Windows one was much, much older (from 2010). I disabled auto updates again after installing the new driver and reset the computer so I could have a specific time to give you, when lo and behold, the sound worked after resetting. I don't want to speak to soon, but I restarted it 5 more times and the sound worked after every reboot. I'm sure I tried this combination (new driver + disabling auto updates) in the past, but it seems to be working now. I'm going to see how it goes the next couple of days, and if it acts up again, I'll upload the Admin Events. Thanks for your help!