If having issues fetching windows updates or connecting to the internet, and the LAN connection is verified to be good, use these instructions to reset the NUC's network adapter:
-Open PowerShell or Command Prompt and run as administrator, type the following commands by pressing enter at the end of each command line:
netsh winsock reset
netsh int ip reset
netsh advfirewall reset
ipconfig / flushdns
ipconfig / release
ipconfig / renew
Close and restart the computer at the end of all the commands.