Three days ago, after updating Windows 10 to the most current build the driver: Realtek HD Audio 2nd output (Realtek High Definition Audio) is missing. The causes the headphone to not be recognized or to work at all.
Restoring to a previous version of Windows 10 solves the problem. Uninstalling and reinstalling the audio driver did not solve the problem.
The WINDOWS 10 TEAM needs to FIX THIS and verify their new release of Windows 10 more thoroughly.
What other drivers are missing ir incomplete in new release of Windows 10?