Open the Additional Drivers window.
Safe Download and Install from the official link! Right click on High Definition Audio Device and select Update Driver Software… 3.
Information is believed to be accurate and reliable at the time it is furnished.
After upgrading your system, let Windows sit for at least 15 minutes to ensure any background downloads and installation are complete.
Unfortunately, if you try to search for it on the Nvidia website, nothing would turn up.
Now it's time to tell bumblebee which driver should be used.