If you noticed that the Antimalware Sevice Executable process takes up high CPU on Windows 10, rest assured – you’re not alone. Many Windows 10 users also report this problem. More importantly, you can fix this problem by yourself without asking a technician for help.

In this article, you’ll learn what Antimalware Sevice Executable exactly is and how to fix its high CPU usage issue.


What is Antimalware Service Executable?

You may know Windows Defender in your Windows, it’s an antivirus software built-in Windows 10. Antimalware Service Executable is one of the background-running services in Windows Defender. It’s also known as MsMpEng.exe, you can find this on the Details tab in your Task Manager.

 Antimalware Service Executable is running to scan the malware and spyware when you access them. It will detect if there’s anything harmful. Besides, it also takes a background scan of your system for any viruses or worms. Its scanning relies heavily on your computer’s CPU, that’s why you find it’s eating the CPU usage on your Windows 10. Couldn’t we solve this problem for the safety of our Windows? No, you can solve it. Move on to the next part, please.


Fixes for ‘Antimalware Service Executable high CPU‘:

  1. Change Windows Defender’s schedule
  2. Add Antimalware Service Executable to Windows Defender exclusion list
  3. Check Real-time protection settings
  4. Bonus tip  <Try this addition tip if your computer still runs slowly>

Fix 1: Change Windows Defender’s schedule

The error is mainly due to its real-time protection feature. So we can change Windows Defender’s schedule to fix it.

1) On your keyboard, press the Windows logo key and R at the same time to invoke the Run box.

2) Type taskschd.msc and press Enter.

2) Double-click on Task Scheduler Library Microsoft Windows.

3) Double-click Windows Defender in Windows. Then double-click Windows Defender Scheduled Scan.

4) Uncheck Run with highest privileges.

5) Uncheck all the items in the Conditions section. Then click OK.

With the steps above, your error should be fixed now.

If unfortunately, it doesn’t work, please don’t be frustrated, try the following method.


Fix 2: Add Antimalware Service Executable to Windows Defender exclusion list

1) On your keyboard, press the Windows logo key and I at the same time to open the Settings window.

2) Click Update & security.

2) Under Windows Security, click Virus & threat protection.

3) Under Virus & threat protection settings, select Manage settings.

4) Under Exclusions, select Add or remove exclusions.

5) Click Add an exclusion, then select Process.

4) Type Antimalware Service Executable. Then click OK.

Now you have added Antimalware Service Executable to Windows Defender exclusion list. The error should be fixed by now.

Fix 3: Check real-time protection settings

Another workaround for this issue is turning off the real-time protection.

1) On your keyboard, press the Windows logo key and I at the same time to open the Settings window.

2) Click Update & security.

2) Under Windows Security, click Virus & threat protection.

3) Turn off Real-time protection and wait for a minute, then turn the Real-time protection back on.

Turning off Real-time protection leaves your device vulnerable, so make sure you re-enable the setting after the troubleshoot.

Still Running Slow?

If, after trying the above, your PC is still running slow, we highly recommend you scan your Windows OS for faulty files or missing system components.

There are two ways you can do this:

  • Option 1 – Automatically (Recommend)
    Use the Windows repair tool Restoro to fully analyze your computer environment and identify the cause of the monitor issues. This will deal with issues related to system errors and critical system files.
  • Option 2 – Manually
    Use Windows built-in tool System File Checker to check for corrupt, damaged system files and repair them. However, this can only help you fix issues related to major system files, and it won’t be able to help with issues caused by damaged DLL, Windows Registry keys, etc.

Option 1 – Repair corrupted files with Restoro

Restoro is a professional Windows repair tool that can scan your system’s overall status, identify faulty files, and replace them automatically. In this way, you get an entirely fresh system with just one click and without losing any programs, settings, or personal data. (Read Restoro Trustpilot reviews.)

Here’s how to use this tool to repair broken system components in just one click:

1) Download and install Restoro.

2) Open Restoro and run a free scan on your PC.

Wait for Restoro to scan your PC. This may take a few minutes and you’ll get a detailed report of your PC status after this.

3) You can review a summary of the issues detected after the scan is finished. Click START REPAIR to start the repair process. This requires the full version – which comes with a 60-day Money-Back Guarantee.

Option 2 – Run System File Checker

System File Checker is a Windows built-in tool that can help you scan for and repair any corruptions of your system files. Follow the instructions to see how to use it:

1) On your keyboard, press the Windows key and X at the same time, then click Windows PowerShell, or Command Prompt (Admin) if you’re on Windows 7. 

2) Click Yes to continue. 

3) Type sfc /scannow, then press the Enter key on your keyboard. Leave the Command Prompt window on until the command completes. 

So that’s it for this guide. Hopefully, it helped. Feel free to leave a comment below if you have any questions or suggestions.

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