I had this problem a while back, I tried every fix and nothing worked. I reset my computer to factory settings twice and I still didn't have audio drivers. Whenever I try to manually install them it blue screens my computer. Finally, a week after giving up and deciding to just have a computer with no audio I restarted my computer (msi gs65 if that matters for anything) and my audio was back. A few weeks later (today) I restarted my computer and the audio was gone again. I don't understand what is going on, any ideas?