Morning Cooper. Thanks for the reply. To answer your questions:
-It has been happening consistently multiple times a day for a really long time. Months. I can't pinpoint the exact day.
-It only happens with Autocad C3D 2019. I use Infraworks some and I don't get any messages. Happens when I boot the computer up and when I open and close C3D.
-I don't know if and app is causing this.
-As I mentioned before, it has been months.
-I guess I never looked so closely at the window error message.
So of course this morning, it did not do it. First time in a long time. A coworker has been having the same issue with his C3D 2018. While responding to your post this morning, I decided to look through the Event Viewer and found Error events that say "The Autodesk Desktop App Service terminated unexpectedly. It has done this 4 time(s)." So maybe it has been the Desktop App Service. I will ask my coworker if it occurred this morning to him.