It took over five years, but Microsoft has finally fixed a bug that caused Windows Defender to drain CPU resources when Mozilla’s Firefox browser is active. In 2018, Mozilla staff reported that ...

I just noticed on my mom's computer that some "MsMpEng.exe" process (labeled "Antimalware Service Executable" and located under "C Program Files\Microsoft Security Client\") is consuming 100% of CPU.

When using Windows Performance Recorder (WPR), which checks system and application behavior and resource usage, if the CPU usage rate of 'MsMpEng.exe', which is the Microsoft Defender execution ...

Here I was playing some Far Cry 2 on my machine (so not exactly a resource hog these days), when suddenly the screen goes black, I can't Ctrl Alt Delete, or get the task manager or anything, and the ...

The Antimalware Service Executable, also known as MsMpEng.exe, is a critical component of Windows Defender that runs in the background to protect your system from malware and other security threats.