Can not access internet via WiFi or ethernet after 10.13.2 update

Mac Mini 2011 8 GB RAM

upgraded from 10.13.1 to 10.13.2

now have absolutely no internet with both WiFi and Ethernet connections, IP address via DHCP is assigned under both

internet on 9+ other devices connecting to the same router are unaffected and normal

tried the fix located below, but it had no effect.

https://becomethesolution.com/blogs/mac/fix-mac-os-x-high-sierra-upgrade-no-wifi -internet-after

Also looked at kext files (see comments), and deleted all that hadn’t been modified in the past year.

Any suggestions? This is 100% software.

Apple needs better QA in software on macOS and iOS. Lots of terrible bugs of late