cnar0mui_d80d7.dll is a CNAR0MUI.DLL
belonging to Canon Advanced Raster Printing System Printer Driver User Interface for Microsoft Windows 2000//XP//Vista
from Canon Inc.
Non-system processes like cnar0mui_d80d7.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