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As I understand you get the Startup Error about SmartAudio reinstallation,
Just disable all the other sound drivers from your device manager except the Conexant drivers,
1. Enter device manager
2. click on "sound, video and game controllers"
3. Disable the below choices except "Conexant SmartAudio HD".
If the issue persists, you could make use of the system configurations A.K.A Msconfig (use in the run command after using windows+R buttons) to disable the startup message box and resolving the issue with the popup if everything else is working fine and the popup if the only thing that's annoying.
Keep me posted for further assistance,
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