I managed to solve this issue for a Lenovo Thinkpad Edge E431, which has I believe trouble with the Conexant Audio Driver, so from device manager I uninstalled the Win8.1 device which was successfully detected by Win10 and showed no errors with the driver (the Conexant driver) and this included deleting driver files, then rebooted, and the Win 10 detected the Conexant Audio driver as one device, had erroneous error messages, of Dolby, then randomly I decided to go to the Windows device manager from Control Panel and then update the Conexant driver, and something happened said it was incomplete and needed to reboot, guess what the Dolby Digital Advanced Audio driver appeared in sound settings and there were no error messages during startup Viola!!!!! Needless to say there are now two Dolby icons in Sound settings, but can manage to use the second one called Dolby Digital Advanced Audio, managed to listen to music, and there was a noticeable improvement in the volume and clarity. Seems like a slight hack but managed to make Win10 a more pleasurable experience...
Hope this helps...
Dolby Advanced Audio V2 User Interface Driver for Windows 8.1 (64-bit), 8 (32-bit, 64-bit) - ThinkPad L430, L530. Laptops and netbooks:: thinkpad edge laptops:: thinkpad edge e431 Lenovo PC Support - us. Laptops and netbooks:: thinkpad edge laptops:: thinkpad edge e431 Lenovo.
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