wq_r0409.dll is a WQTray.exe
belonging to WiQuest Software Support Package 1.3
from WiQuest Communications, Inc.
Non-system processes like wq_r0409.dll 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.