What is MsMpEng.exe?
MsMpEng.exe is the AntiMalware scanning program of Microsoft Security Essentials. It monitors the data and contents from the internet, in the memory or from the discs. If it detects any virus or malware, it will give a warning and Microsoft Security Essentials will fix the problem. Most of the time it runs quietly and hideously and you’ll never notice it.
Microsoft Security Essentials
Microsoft Security Essentials is a free security product to protect home and small business PCs from viruses, spyware and malware. It’s like a bonus to Windows users since they used to purchase similar products for PC security. Because it’s free, people tend to install it on their computer before considering if they really need it or when to use it.
Microsoft Security Essentials updates regularly to get the new virus and spyware definition and the client use the definition to detect hazards coming from the internet or sharing resource.
Memory or CPU problems caused by MsMpEng.exe
Sometimes MsMpEng.exe consumes excessive memory or CPU, which means there’s conflict between MsMpEng.exe and a running process or service. In most cases, the conflict comes from another security software. If you are using more than one security software, make a choice and leave only one in your system.
If the conflict continue to occur, you need to find the other process running and trying to visit the same data as MsMpEng.exe.