The Boot Camp Realtek drivers did not install for me. It wasn't
obvious at first because the Boot Camp setup program didn't
show an error message. Check carefully in device manager to
see who signed the drivers. Also check for the presence of the
file 'C:\RHDSetup.log':
Code:
[ResponseResult]
ResultCode=0
[Install Progress]
Confirm Realtek Driver
Check Operation System Version
Realtek HD Audio Driver WDM Directory Exist .
Microsoft Bus Driver Directory Exist
delete C:\Program Files (x86)\Realtek\Audio\InstallShield
Copy Microsoft HD Audio QFE from MSHDQFE Directory
Copy Realtek HD Audio Driver from WDM Directory
Install Realtek HD Audio Audio Driver
--> SetupAPI result LAAW_PARAMETERS.nLaunchResult = -1
InstallShield was aborted
You can also try running 'RealTekSetup.exe' directly. Then you
will see if it succeeds.
I used 7zip to extract the Realtek drivers and manually updated
the audio drivers. Then I had sound.