Antimalware Service Executable High CPU on Windows 10 [Solved]

What is Antimalware Service Executable & Fix its High CPU Usage Issue on Windows 10

By April Cai in Technical Tips Tags: Task ManagerWindows 10

Does this look familiar?

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.


First things first, 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 detects 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, actually you can solve it. Move on the next part please.


Try these fixes:

  1. Change Windows Defender’s schedule
  2. Add Antimalware Service Executable to Windows Defender exclusion list
  3. Bonus tip  <Try this addition tip if your commputer 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 sametime 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 works, 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) Click Windows Defender. Then click Add an exclusion in Exclusions.



3) Click Exclude a .exe, .com or .scr process



4) Type MsMpEng.exe. Then click OK.



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


Still Running Slow?

If, after trying the above, your PC is still running slow, we highly recommend you to update all your available device drivers. The latest drivers can keep your computer running stable and quickly.

There’re two trusted ways you can update your device drivers — manually or automatically.

Manual driver update – You can update your device drivers manually by going to the manufacturer’s website, and searching for the most recent correct driver for the exact device. Be sure to choose only drivers that are compatible with your variant of Windows system versions.

Automatic driver update – If you don’t have the time, patience or computer skills to update your drivers manually, you can, instead, do it automatically with Driver EasyDriver Easy will automatically recognize your system and find the correct drivers for your devices, and your variant of Windows system, and it will download and install them correctly:

1) Download and install Driver Easy.

2) Run Driver Easy and click the Scan Now button. Driver Easy will then scan your computer and detect any problem drivers.

3) Click the Update button next to any flagged device driver to automatically download the correct driver, then you can manually install it. (you can do this with the FREE version).

Or click Update All to automatically download and install the correct version of all the drivers that are missing or out of date on your system. (This requires the Pro version which comes with full support and a 30-day money back guarantee. You’ll be prompted to upgrade when you click Update All.)

4) Restart your computer.