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’re reading this article, you probably noticed that the Antimalware Sevice Executable process takes up high CPU on your Windows 10. But rest assured, you’re not alone. Many Windows 10  users have this problem as you do. More importantly, you can fix this problem by yourself without asking a technician for help.

In this article, we will tell you 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 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.

How do I Fix Antimalware Service Executable High CPU on Windows 10 ?

Below covers 3 easy methods for you to try. Start from the top of the list and work your way down.

Fix 1: Change Windows Defender’s schedule
Fix 2: Add Antimalware Service Executable to Windows Defender exclusion list
Fix 3: Additional 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 didn’t serve you, make sure to try another fix below.

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

1) On your keyboard, press the Windows logo key  and I at the sametime 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, it’s advised to update your device drivers. The latest drivers can keep your computer running stable and quickly.

If you have no time, no patience playing around with drivers, let Driver Easy help you. You can try its Free version, and update your drivers one by one. But if upgrade to Pro version, you can update all your missing and outdated drivers automatically with just one-click. It comes with a no-questions-asked 30-day money-back guarantee and professional tech support 24/7. Thus no worry to take it a try!

  • LZ

    It doesnt give me the option to untick the boxes 🙁 The 2nd option when I choose Windows Defender, none of those options are there. My screen looks totally different. No exclusions.

  • Petr Ppsgr Ševčík

    But wouldnt this shut off the malware protection completely?

  • Paul Ireland

    Real time protection was my issue. It made everything running increase in CPU, especially Sublime Text. Disabled and now I’m good. Thank you!

  • hannoverfisst

    Microsoft claims this has minimal impact on CPU performance, but whenever I check the task manager, Windows Defender was always using 6-8% cpu and the Antimalware Service Executable was using another 6-8% cpu. I did not really see any program impact however my mouse pointer would change to the spinning busy icon for about 1 second every 2-3 seconds and that alone was very annoying! This fix seems to have resolved that though. Thanks much!!

    • Nomorepeasantlife

      consider yourself lucky. mine was hovering around 34% at idle. Fix 2 got it down to 7% I consider this a win @hannoverfisst:disqus

  • Matt

    Fix 1 = could not uncheck “run at highest priority” in step 4
    Fix 2 = worked! Many Thanks