What is MsMpEng.exe?

The msmpeng.exe is a Service Executable.

This file is part of Windows Defender. Msmpeng.exe is developed by Microsoft Corporation. It’s a hidden file. Msmpeng.exe is usually located in the %PROGRAM_FILES% sub-folder and its usual size is 18,320 bytes.

Msmpeng.exe is anti malware detection engine that is used to scan PC. However if the file conflicts with other processes, it may consume excessive memory and CPU. If this is the case, one can remove the process by calling windows defender and even schedule this scan to free hours.

The only threat involved with Msmpeng.exe is the consumption of system resources otherwise it is completely safe process.