msmpres.dll is a Resource Module
from Microsoft Corporation
belonging to Windows Defender
. Windows Defender is an anti-spyware program that scans for malware on PCs.
Non-system processes like msmpres.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.