mcscm.dll is a MCSCM
belonging to MCSCM Memory Card DLL
from SCM Microsystems Inc.
Non-system processes like mcscm.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.