aeccuinetwork.arx is a AeccUiNetwork
belonging to AutoCAD Civil 3D
from Autodesk, Inc.
Non-system processes like aeccuinetwork.arx originate from software you installed on your system. Since most applications store data in your system's registry, it is likely that your registry has suffered fragmentation and accumulated invalid entries which can affect your PC's performance. It is recommended that you
check your registry to identify slowdown issues.