wcu200g.exe is a WCU200G
belonging to AT-WCU200G Wireless USB Adapter Client Manager
from Allied Telesyn
Non-system processes like wcu200g.exe 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.