I had to reinstall drivers on my Aspire TC-605 running Win 8.1 Everything seems to be working ok, except I get a no audio output device installed. I have tried everything I can think of, including deleting and reinstalling all of the drivers, disabling and re-enabling the hardware in Device manager. I am thinking that perhaps there is a secret in the sequence that the Intel Chipset drivers are installed before the Realtek audio drivers? I have seen a zillion reports on various web sites and a few that reference restarting the Windows Audio service. I have tried ALL of these "fixes" numerous times, but no luck!! Any help in diagnosing and fixing this would be greatly appreciated.