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.

There are two common factors that can cause Antimalware Service Executable to take up too much CPU resources, from its real time feature and Full scan feature. Real time protection Feature is ...

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 ...

ウェブブラウザのFirefoxを開発するMozilla Foundationが運用するバグ管理システムのBugzillaで、「FirefoxでウェブブラウジングするとMicrosoft純正のアンチウイルスソフトウェアであるMicrosoft Defender(Windows Defender)がCPU使用率を跳ね上げる」というバグが報告されています ...