Ran Intel Driver & Support Assistant, shows -
BIOS - Latest version: 0047 Installed Version: 0031. Install FAILS!
Graphics - Intel® HD Graphics Driver for Windows® 10 for Intel® NUC - Latest version: x.x.x.6519 Installed Version: N/A (Microsoft Basic Display Adapter)
Install FAILS! "This installation package not supported by this processor type"
Manual installation also fails. No HDMI audio.
Wow. I just checked. You are using build 14393, version 1607, from 2016.
Get upgraded to 1809 and come back once you try these updates on a SUPPORTED release of W10.
Just to complete Al's very good advice to Upgrade Windows to the version 1809, you should upgrade your bios first. You have now bios version 0031 installed. I don't know the exact history of bios revision for your NUC however version 0031 doesn't exists in bios release notes. Could be this version was pulled out by Intel. Any way because the bios update in your case is a major update, I suggest that you do it using Bios recovery method with Yellow Security Jumper removed as detailed in the following paragraphs:
Hello Al & Waksman,
Thanks for the guide. Have some assignments till Sunday, so will do the updates next week.
Don't want to take a chance now as the system is workable.