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Antimalware Service Executable High CPU Usage

A CPU (Central Processing Unit) or processor is known as the most significant internal part for any modern computing gadget and device. It is the component that plays the role of interpreting and executing most computer software and hardware system.

Generally, a computer utilizes only a small extent of CPU processing capacities, especially when it is only in an idle state most of the time. Unless its user runs the high-end programs and gaming, the CPU usage certainly will rise at particular degrees.

However, in Windows 10, there are some times that even though the computer features an adequate processor capacity and system memory, the user still experiences slow computing performance and lag issues on their PC.

Some possibilities can cause this matter, and one of the current and well-known reason is the 100% disk usage. Besides, this high disk factor causes by some specific system program that runs in the background, and the Antimalware Service Executable is among them.

A restart is one of the easiest ways to fix this issue. Although, if it is not going to solve this problem, it can be a troublesome day for the users to do their tasks. To that end, in this article, we’ll show several walkthroughs concerning this matter.

Antimalware Sevice Executable (MsMpEng.exe)


Antimalware Sevice Executable is also known as MsMpEng.exe. It is the core process for Microsoft Defender or Windows Defender. In short, MsMpEng.exe service is a part of the Windows OS built-in anti-spyware, antivirus, and anti-malware tool.

This service automatically scans all the downloaded files for the security purposes of a system, especially for the application file types. It can quarantine and remove all the detected files that have been infected by the spyware or virus, following its threats to the computer.

Since the Antimalware Sevice Executable is a core process for Windows Defender, it runs automatically every time the PC is on. To that end, this service operates in the background, and it used to utilize only a slight amount of CPU capacity percentage.

How to Fix the High Disk Usage of the Antimalware Sevice Executable (MsMpEng.exe)


The Antimalware Sevice Executable scans the system in the background, as it is one of the reasons which causes the high consumption of the CPU power. Hence, it will affect computer performance and caused some delay actions in some short of time.

It is a normal thing if it does not happen frequently. However, it can come about too often for some reason, as it may runs in a loop, still scanning and stuck on some particular task like searching some old corrupted files, folders, and directories.

Most of the Windows users do a simple computer reboot, as it is the easiest way to deal with this matter. Even so, if someone is still experiencing this issue, there are several workarounds they can apply to solve the problem.

Scan with the System File Checker


System File Checker or sfc.exe is a utility in Microsoft Windows OS. This tool lets the users scan corruptions and restore the system files. The corrupted folders in the Windows OS may be the reason why this issue occurs.

Therefore, the sfc.exe may able to solve the problem since it can removes, mends, and replaces all the corrupted data and its directories. Besides, the System File Checker is among the most simple solutions concerning this issue.

  1. Click Start or press the Windows Key
  2. Type cmd and right-click the Command Prompt
  3. Select Run as administrator
  4. On the Command Prompt type sfc /scannow

This command (sfc /scannow) will scan for errors and issues. If it detects one, it will attempt to fix and replace the files. After it repairs the system files, consider to rerun it until there is no error.

Use the taskschd.msc to Reschedule Windows Defender


The taskschd.msc (as known as Task Scheduler) is one of the parts of Microsoft Windows. It allows the end-users or gives them the capability to customize the timetable for the applications and programs to runs at the pre-set of times.

In short, the users can use their time set using the Task Scheduler or taskschd.msc, in which the Windows Defender scans the files in the background. So, it can help them to prevent the MsMpEng.exe service from consuming unwanted amounts of resources while doing their tasks.

So, without further ado, follow these steps below to reschedule Antimalware Sevice Executable on your Windows 10.

  • Press the Windows Key or Click Start. Type task scheduler and hit Enter

  • On the window left pane, go to Task Scheduler Library > Microsoft > Windows > Windows Defender
  • Now, select or double-click the Windows Defender Scheduled Scan

  • On the General tab, untick the checkbox of Run with highest privileges

  • Go to the Conditions tab, untick all the checkbox options

  • Then, select the Triggers tab and click New to create a new time set

Therefore, on the New Trigger window, users can reschedule and set the scan time of Windows Defender between Monthly, Weekly, Daily, or One time. Besides, you can set a particular day and time in which you want your system to be scan.

After the set-ups of your time scan, click OK, and OK again. Also, don’t forget to restart your laptop. If the MsMpEng.exe is still consuming high disk usage, launch the Task Scheduler or taskschd.msc by Run as Administrator and follow the steps which have given.

Turn off the Windows Defender


One of the best ways to deal with the mentioned issue is to limit the CPU usage on MsMpEng.exe from the task manager, and “Set affinity” to the MsMpEng.exe service. It allows the user to make this service uses less percentage of resources.

Although, for some reason, this method is not working anymore on today’s Windows operating system, especially Windows 10. Fortunately, you still can disable the Windows Defender using the Local Group Policy Editor to prevent the high disk issue.

However, take note that disabling the Antimalware Sevice Executable may put your device into lesser security and make it exposes to the possibility of being harmed. So, turn it back on when you go online or connect your laptop to any external devices.

Also, this method may not work on the Windows 10 Home edition. So, the users need to check their Windows 10 version first before applying this solution. To turn off the MsMpEng.exe using the Local Group Policy Editor, follow these steps (Please continue with caution).

How to Access the Local Group Policy Editor

  • Press Windows Key + R to open the Run dialog box
  • Type or copy and paste gpedit.msc
  • Hit Enter or click OK button to open the Local Group Policy Editor

How to Disable Windows Defender using gpedit.msc

  • On the window of Local Group Policy Editor, navigate to Computer Configuration > Administrative Templates > Windows Components
  • Find and select the Windows Defender Antivirus
  • Locate and double-click to edit the Turn off Windows Defender Antivirus setting

  • Change the setting by selecting the Enable option. Click Apply and then select OK

After you follow and do all these steps, you must restart your computer for this solution to take effect and disable your Windows Defender. Following the restart, log into your system and go to Windows Settings by pressing Windows Key + I.

Select the Update & Security and navigate to Windows Security to check whether the Windows Defender is disabled or not. If it is still not disabled, open the gpedit.msc and Run as administrator and follow the mentioned steps earlier.

To launch the Local Group Policy Editor by Run as administrator, you need to run the Command Prompt (cmd) as administrator first. Then, on the Command Prompt type or copy and paste gpedit.msc and hit Enter.

Stop the MsMpEng.exe Service from Scanning its Folder


Excepting or stop the Antimalware Sevice Executable to scans its folder is one of the techniques to prevent this issue occur. Therefore, users can try this method and make an exclusion for Windows Defender directory to be scan.

  • Press Windows Key + I to launch Windows Settings and click Update & Security

  • On the left pane, select Windows Security and click Virus & Threat protection

  • Under the Virus & threat protection settings click Manage settings

  • Scroll down until you find the Exclusions setting, and click Add or remove exclusions

  • Select Add an exclusion > select Folder > copy and paste this path C:\program files\Windows Defender and click Select Folder

  • Restart computer

Use Other Antivirus (Premium or Free) Program


Another best option for Windows users to prevent this problem. If some users still experience the high disk usage issue with its Windows Defender security program, they can use other Antivirus software to protect their personal computers.

We would recommend an Antivirus with premium features for best protection, and it should provide less expose for being harmed by malware, spyware, worm, and many other similar viruses. So, you can disable your Windows Defender without fretting your PC being attack.

A free Antivirus is also okay for some extent of protection. Besides, the free versions are generally limited to discover some types of threats and viruses.

The free Antivirus may able to detect many threats while scanning, but it can’t provide a solution other than removing the infected files.

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Posted in Tech Tips, Windows 10

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