Antimalware Service Executable High CPU Usage

Antimalware Service Executable High CPU Usage

Antimalware Service Executable High CPU Usage
Antimalware Service Executable High CPU Usage is a Windows service that is loaded with antimalware. Every Microsoft operating system comes with the popular Windows Defender feature. In short – this is a built-in malware protection software. It is all in one solution tool that scans computer, removes harmful things like threat, malware, spyware, and virus. It offers real time security from getting affected. It has ability to run all the ongoing activities in PC, checks complete newly downloaded files and installed programs by scanning whether it is harmful or not. Using this tool you can check PC issues such as CPU usage due to file named msmpeng.exe and make your PC performance or speed in every process very slow due to low RAM availability.

Due to this, all the necessary data get affected. It is a Windows service for security essentials and proves helpful to solve one major problem that almost every desktop computer user face that sometime PC get restarted frequently. Msmpeng.exe is left behind from all harmful activities of Microsoft Windows internal antivirus service. Sometimes your PC scans all folders again and again by spending maximum CPU activities, so you can get help from this software.

Antimalware Service Executable:

Search out the ways of fixing antimalware service executable like when PC slow down open ”Task Manager” after that press on button the ”Process” to observe which program is using large quantity of CPU and check CPU usage percentage. Antimalware Executable becomes active and within small time when user is connected to internet, when you are using a flash drive, it will again start hogging up CPU and when you’re using Bluetooth device, It is the name of the process MsMpEng.exe associated with the Windows Defender program. Essentially, this is a process that is used by the aforementioned Windows Defender or the Windows Defender Service. One of the most common problems connected with this process is the high CPU usage and thus, slow loading of the system itself.Antimalware Service Executable High CPU Usage


  • This process usually indicated more than 60 or 70% CPU usage of the device and 100% of the disk itself.
  • Mostly, it happens when the device has been in a “Sleep” or “Standby” mode, and it has been later woken up.
  • One of the most common reasons for such a high CPU usage is the features that scan files, connection, and application in real time.
  • The problem can persist for long periods but also can disappear in a matter of seconds.
  • The Full Scan often takes a lot of CPU as the Windows Defender is running and thus, you might experience delayed response or access to your system.
  • Sometimes the Antimalware Service Executable and its high CPU usage can be caused by malwares already in your system or improperly work device drivers.
  • Also, you might consider that the third-party program is not compatible with your operating system or is not properly registered or installed.
  • Another reason for the CPU problem can be the daily scheduled scan in the Windows Defender that cannot yield to the users’ activity.
  • Also, the regular network activity can be monitored by various filter drives.
  • Sometimes, the Full Scan can take hours, but usually, the CPU usage drops down after it is completed.
  • A third-party antivirus software can be causing the problem too so sometimes uninstalling it and running a full scan and cleanup can fix the problem.

Supported OS:

  • Windows XP, Vista
  • Windows 7, 8 and Windows 10

How to fix it?

  1. Once you opened file location, you must the coy the directory.
  2. In Windows Explorer (8.x version), in top, click tabHome and Copy Path Now,
  3. go to Windows Defender or Microsoft Security Essentials (search for it on Start Menu),
  4. go to Settings Excluded files and locations In first box,
  5. paste the path and click Add The path will show up on the second box
  6. Save changes and your problem must be fixed

Author Note: Having high CPU usage in your Antimalware Service Executable process. It can be quite a nagging problem as your system hags and loads slowly. There are some reasons that might cause the problem, and if you are unable to fix it using the tips mentioned above, you might consider going to a professional technician.

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