Upgraded to Windows 10 version 1709 Build 16299.64 successful.
Upgraded the latest audio driver to Realtek-High-Definition-Audio-Driver_8WWJK_WIN_6.0.1.8142_A04.EXE. I also verified the driver is installed successful.
After reboot, I notice that the audio icon appeared with the red X symbol next to it. It says No Audio Output Device is installed.
I know the audio device driver works for Windows 10 version 1703 Build 15063.726.
Please let me know if anyone else has the same issue.
Please let me know how to submit a service ticket to the Dell for this issue.
Thank you
JR