电脑莫名卡顿、风扇狂转、打开软件半天没反应？打开任务管理器一看，Antimalware Service Executable 进程 CPU 占用直接拉满，动辄 50%、80% 甚至 100%，简直让人抓狂！

The Antimalware Service Executable is a program that runs in the background on your Windows 10/11 PC to protect the computer from viruses and other threats. Sometimes it starts to consume too much ...

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.

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.