I have solution for audio/startup crash

startup crash/Logging In Issue:
change resolution or monitor refresh rate
I changed the resolution and it fixed the problem

Logging In Issue

No audio:

I’m not sure this will work for everyone, but I opened “RivaTuner Statistics Server” which asked administrator permission.
maybe if you open any program that asks the administrator permission audio start to work, while Forza Motorsport 6 Apex running in the background