Do you know what MsMpEng.exe is? Why is it running on your Windows computer? In case you are still wondering, I can confirm that MsMpEng.exe isn't spyware or malware. It's used by both Microsoft Security Essentials in Windows 7, and Windows Defender, from Windows 8. What should you do when the MsMpEng.exe process is eating up all CPU resources? I'm currently using Windows Defender on one of my computers. Based on my experience, it's a good free antivirus program for individuals. However, sometimes, I noticed that the MsMpEng.exe uses a lot of CPU resources and causes high CPU usage forThe post How To Fix MsMpEng.exe High CPU Usage Problem appeared first on Useful PC Guide.