When building a new system for a customer, I was faced with the error:
Microsoft Bus Driver should be loaded in your system before installing Realtek HD Audio Driver
After much internet-searching and hair tearing, I was about to give up. Nothing was working – none of the downloads or drivers seemed to do the trick.
As a last throw of the dice, I decided to check the BIOS. I found that the onboard soundcard had been disabled?! Enabling this did the trick.
Simple when you know how!