What Exactly Is Antimalware Service Executable? Why is it saying High CPU Disk Usage?

What Exactly Is Antimalware Service Executable?

If your computer is slow, you may find that the antimalware service executable, or MsMpEng.exe, the process is taking up a lot of resources in Task Manager. You can turn it off, but it’s a good idea to know what this process is for and how it might affect the security of your PC if you do.

What’s Antimalware Service Executable?

Antimalware service executable is a Windows Security process that runs real-time protection against malware.


Antimalware service executable, also called msmpeng.exe, runs in the background so it can scan files and programs from time to time.

When a virus or other malicious attack is found by an antimalware service executable, it deletes or puts it in a quarantine folder.

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Why Does Antimalware Service Executable Use up So Much CPU?

The main reason that the antimalware service executable uses too much CPU is that it runs constantly in the background.

While it’s running in the background, it scans programs and files and takes action when it finds something malicious.


Also, the antimalware service executable uses up too much CPU because it scans its own folder, C:Program FilesWindows Defender.

So, stopping antimalware service executable from scanning its own folder is one way to make it use less CPU.

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How to keep Antimalware Service Executable from using too much CPU?

You can keep antimalware service executables from using too much CPU by rescheduling Windows Security scans and stopping it from scanning its own folder.

Rescheduling scans won’t make them happen all the time, and preventing the executable from scanning its own folder will turn off real-time protection.