Culver City, CA
It does not have a wireless card, but...
I don't know why it just didn't say it was having somekind of IP conflict. I changed it's static IP and boom, no more issue at shutdown. It runs instrumentation and that is the reason for the static IP, and I have never had any issue before, but I remembered a month ago I was surprises at the IP on this machine, but there was no problem, but that remembrance got me thinking down the path that apparently hos resolved the conflict.
Thanks for peoples time who read this.