How to fix ‘Antimalware Service Executable’ high CPU usage

Computer nowadays are being used for daily work, and for working one does needs CPU to process the arithmetic logic, for which it does require to be free. Windows which is one of the best operating system manages to keep the CPU free for most of the time and hence makes the workflow for the user quite acceptable. There are plenty of services which works in the background out of which one is Antimalware Service Executable which is a part of Windows Defender which is indeed a part of Windows Operating System.

Sometimes the Antimalware Service Executable is found to be the culprit which is hogging up the resources and bottle necking the CPU and RAM for the normal working of the device. You might notice this issue and today we are going to solve the issue for you for which you will have to follow the solution which we will be discussing in the later part of the article.

Either you can find the Antimalware Service Executable to be in the Task Manager or the msmpeng.exe both are the same and one is the file which runs the Antimalware Service Executable service which other is the name of the service itself. If you find any of them then follow these steps to get some of the resources for you to get your work done. There are a couple of fixes which are as follow:

Change Windows Defender’s Scheduling options:-

Windows usually keep on running the full scan of the Windows Defender which might eat up the resources while scanning hence you can schedule the full scan when you are less likely to use your system for which you will have to follow these steps:

  • Open task Scheduler by searching for it in the Start Menu.
  • Once Task Scheduler Opens you will have to open the Task Scheduler Library. Navigate to the following destination in the Library: Library/Microsoft/Windows/Windows Defender.
  • Now open the Windows Defender Scheduled Scan.
  • You will get a list of conditions in the conditions tab out of which all you have to uncheck and click on OK.
  • Now click on the Triggers tab and schedule a Windows Defender Scheduled Scan.
  • Create a schedule when you will not be using the PC for any resource demanding work.
  • You will also have to repeat the all the above steps for Windows Defender Cache Maintenance, Windows Defender Cleanup, Windows Defender Verification which are also found in the same folder.

Add Antimalware Service Executable to Windows Defender’s Exclusion list.

  • Open the Windows Task Manager by pressing Ctrl + Shift + ESC.
  • Head to the processes tab and search for Antimalware Service Executable and right click on the process and select the Open file location option.
  • Copy the path in the Explorer
  • Now open the Windows Defender settings and add the path to the Exclusion list of the Virus & threat protection.

Disable Windows Defender

  • Press Windows Key and R button at the same time to open the Dialog Box.
  • Now type regedit and click ok, to open the Registry Editor.
  • Now head to the following address in the Registry Editor::
    • HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender.
  • If you find any entry in the registry with the name DisableAntispyware open it and set it’s value to 1.
    • If the entry doesn’t exist then make a new DWORD (32 Bit) entry and name it DisableAntispyware and set it’s value to 1.

Check for malware infections:

It might be possible that your system is affected by a malware attack. Hence Windows Defender is searching for all the different infected files. The best option will be to run a full Windows Defender scan. The scan will take a lot of time hence leave it for sometime, do this only when the above methods doesn’t helps.

These are some of the options which you must follow in order to keep Antimalware Service Executable service using less resources keeping most of the resources available for you to use in your daily tasks.

Do let us know in the comment section below if you find any difficulty in following any of the above steps.


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