Fix Antimalware Service Executable High CPU Usage {2018 Updated}

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In case you are a Windows user, it is pretty obvious to know about Antimalware Service Executable program. This in-built program has its pros and cons that we are about to discuss in this article, with the primary focus on fixes for the error generated during its usage.

What is Antimalware Service Executable?

Antimalware Service Executable is anti-virus software that comes under Windows Defender. It runs in the background and protects the system against several types of Malware, spams and other security threats like worms for the smooth functioning of your operating system.

Recently it has been found guilty of causing high CPU usage along with other concerns that include freezing or decelerated system performance. In this post, you will find ways to fix Antimalware Service Executable from sucking up your CPU along with other details.

Why Does Antimalware Service Executable Error Occur?

The fact that this software is checking for malware every second might be the reason Antimalware Service Executable is causing such harm to the CPU. The Full-Scan feature drains the CPU of most of its resources and the outcome is freezing slow or delayed performance of the computer system.

For some Microsoft users, it is just taking up disk space but not harming or in other words not heating up their CPU. It is also found that a file named MsMpEng.exe, in particular, is the culprit. Just like any other security program Antimalware Service Executable also periodically checks for new updates or security threats, so it is bound to eat up your system resources whichever it may please.

How to Fix Antimalware Service Executable High CPU Usage Error?

We’ve found & bundled some of the proven, working & easy to use methods below to fix this issue. Find the suitable one & get rid of this error.

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Method #1 Change Windows Defender’s Schedule Settings

1. Click on the Search bar. Type and open “Administrative Tools“. It comes under Control Panel. Alternatively, you can navigate to Control Panel>System and Security>Administrative Tools.

Administrative Tools
Administrative Tools

2. Now, select Task Scheduler from the list displayed.

Select Task Scheduler
Select Task Scheduler

3. Double-click on Task Scheduler Library & navigate to Microsoft>Windows.

Task Scheduler
Task Scheduler

4. After that, find & double-click on Windows Defender.

5. Right-click on Windows Defender Scheduled Scan and select Properties.

Windows Defender Scheduled Scan
Windows Defender Scheduled Scan

6. Uncheck the option Run with highest privileges.

Uncheck Run with highest privileges
Uncheck Run with highest privileges

7. Also, uncheck all the items under Conditions tab. Click OK.

Uncheck Items Under Conditions Tab
Uncheck Items Under Conditions Tab

After you are done, check the Task Manager. You will find the change in CPU expenditure by Antimalware Service Executable.

Method #2 Disable Windows Defender Tasks

1. Type and select “Administrative Tools” in the Search bar.

Administrative Tools
Administrative Tools

2. Find and open Task Scheduler from the list.

Select Task Scheduler
Select Task Scheduler

3. Navigate to Task Scheduler Library>Microsoft>Windows>Windows Defender.

Windows Defender Task Scheduler
Windows Defender Task Scheduler

4. Right-click on one of the tasks and select Disable. Do the same for all the remaining ones.

Disable Windows Defender Tasks
Disable Windows Defender Tasks

This will also stop Antimalware Service Executable from freezing computer system’s performance.

Method #3 Exclude The File MsMpEng.exe

1. Open the Task Manager by this combination of keys CTRL+SHIFT+ESC.

2. Next, search for MsMpEng.exe (Antimalware Service Executable) process.

Look for MsMpEng.exe Antimalware Service Executable
Look for MsMpEng.exe Antimalware Service Executable

3. Right-click on it & choose Open File Location.

4. You will find a file named MsMpEng.exe. Copy its file path by clicking on Home Tab and selecting Copy Path option.

Copy MsMpEng.exe File Location
Copy MsMpEng.exe File Location

5. Now, press Win Key+I together & select Update & security.

update and security
update and security

6. Select Windows defender from the left pane.

7. As you scroll down, you will find the option Exclusions. Click on Add an exclusion.

Add an Exclusion
Add an Exclusion

8. Scroll down again to click Exclude a .exe, .com or .scr process.

Exclude a .exe, .com or .scr process
Exclude a .exe, .com or .scr process

9. Type “MsMpEng.exe” in the text field & click OK.

Type MsMpEng.exe
Type MsMpEng.exe

10. Close Settings as well as Windows Defender window.

Now when you open the Task Manager where you will notice that the Antimalware Service Executable process has stopped.

Method #4 Opt for Another Antivirus Software

This is the go-to option in case this problem continues to kill your brain. Antimalware Service Executable is a default option for anti-virus in Windows operating system. So, instead of using this service you can switch to any other anti-virus program which does not heat up your CPU. You can decide on anyone from the given:

  • Malwarebytes Anti-Malware
  • AVG AntiVirus Free
  • SpyBot Search & Destroy
  • Bitdefender Antivirus Free Edition
  • Emsisoft Emergency Kit

Either of these will be a great security program to boost the operating system instead of using inbuilt Antimalware Service Executable software.

Method #5 Perform a Full-scan

If this problem bothers you to a greater extent, opt for a full scan of your system by using any other licensed software for any mean worms or Malware. Security threats can be checked so that you can be sure of your anti-virus program.

Method #6 Disable Windows Defender

Disable Windows Defender Using Registry Editor

1. Open the Run Dialog Box by pressing this combination of keys Windows Key + R.

2. You will see the Run Dialog Box wherein you need to type “regedit“.

regedit
regedit

3. Click on OK. This will open the Registry Editor.

4. Next, you need to go all the way to Windows Defender. Navigate to this registry key:

HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender

5. There you will see a registry entry DisableAntiSpyware. Select and double-click on it to set its data value to 1.

Change Value of DisableAntiSpyware to 1
Change Value of DisableAntiSpyware to 1

6. If no key is present then you have to create one. Simply, right-click in the empty space in the right pane & click New>DWORD (32-bit) option. Name it DisableAntiSpyware & double-click on it to change its value to 1.

Create a New DWORD 32-bit Value
Create a New DWORD 32-bit Value

7. Restart your PC.

Disable Windows Defender Using Local Group Policy Editor

1. First of all open the Local Group Policy Editor. Do this by opening the Run Dialog Box by pressing this combination of keys Windows Key + R and typing “gpedit.msc” in the dialog box.

gpedit.msc
gpedit.msc

2. Next, navigate to this route Computer Configuration>Administrative Templates>Windows Components>Windows Defender Antivirus.

Turn off Windows Defender Antivirus
Turn off Windows Defender Antivirus

3. In this new window find the option Turn Off Windows Defender Antivirus & double-click on it.

4. Select Enable to disable Windows Defender.

Choose Enable
Choose Enable

5. Click on Apply & then OK.

The Windows Defender is now disabled.

Temporary Disable Windows Defender

1. Hit the Start button and type “Windows Defender Security Center.”

2. Next, navigate to Virus & threat protection>Virus & threat protection settings.

Virus & Threat Protection Settings
Virus & Threat Protection Settings

3. You will see Real-time protection option. Set it to off.

Disable Realtime Protection in Windows Defender
Disable Realtime Protection in Windows Defender

This change does not last as Windows Defender will re-enable itself soon in case it checks and finds that you have not installed any other antivirus program.

Method #7 Update Your Drivers

Antimalware Service Executable process can bring up many issues like high CPU usage if the drivers of your device have become old or outdated. You can choose to download the drivers manually but this method is very time-consuming. So, it’s better to go for a better driver update tool like DriverEasy which has the feature of updating all the outdated device drivers at once in your computer system. So it is highly recommended to use DriverEasy to complete your work as soon as possible.

Method #8 Delete The Directory Of Windows Defender

According to many users, the Antimalware Service Executable problem can be solved by deleting the directory of Windows Defender. Windows Defender is an essential element of Windows and removing it might lead you to other issues in your computer, so think twice before deleting the Windows Directory to solve your problem. However, you can create a backup of your files and System Restore Point before deleting the directory. It will help you to restore your computer if anything goes wrong in the process. Follow the steps to remove Windows Defender:

1. Go to C:\Program Files\ and find the Windows Defender folder.

Windows Defender Folder
Windows Defender Folder

2. Get the ownership of Windows Defender folder.

3. At last, delete Windows Defender directory.

Delete Windows Defender Folder
Delete Windows Defender Folder

These steps will remove the Windows Defender from your computer and your issue of Antimalware Service Executable high CPU usage will get resolved.

Method #9 Repair Corrupt Files Of Defender

Antimalware Service Executable process can lead to high CPU usage but this problem can be solved by downloading and running ReimagePlus to check and repair corrupt or missing files. After doing this, if files are still found to be fraudulent or missing, fix them and then check if the CPU usage has become low or not. If it is still on high mode, then try another method.

Method #10 View Partition & Clear the Junk Files

If you are the one who got into this issue recently, then you can have a look at your disk to check if it’s on right place or not. You can use any professional tool to check your disk like EaseUs free partition tool. This can help to get the work done in no time. Follow the steps:

1. Download & install EaseUs Partition Master from their official website & run it in your computer.

EaseUS Partition Master
EaseUS Partition Master

2. Now right-click on the system drive and all other partitions to check the files which are corrupted in your system. Press Check partition.

EaseUS Check Partition
EaseUS Check Partition

3. Choose the suitable way out of these: Check Partition Properties, Call Windows Chkdsk to fix errors, Surface Test.

Methods to Check Partition
Methods to Check Partition

4. Click on OK.

5. Now EaseUs Partition Master will check and repair the system file errors for your PC. Click on OK to get it done.

6. After that, navigate to Cleanup and Optimization>Junk File Cleanup. Click on Analyze to find out the junk files in your PC.

Analyze
Analyze

7. Now select Clean up to clean them up.

Clean up
Clean up

Method #11 Run CCleaner

  1. Download & install CCleaner on your PC.

2. Right-click on it to open on your system.

3. Check the following options in the Cleaner section, under the Windows tab.

CCleaner Cleaner Settings
CCleaner Cleaner Settings

4. Simply, click on Run Cleaner button once you’ve checked appropriate options.

Run Cleaner
Run Cleaner

5. Further, navigate to Registry tab & make sure that following options are checked.

Registry Cleaner Settings
Registry Cleaner Settings

6. Select Scan for issues & at last click on Fix selected issues.

Scan for Issues
Scan for Issues

7. Choose Yes when CCleaner asks “Do you want backup changes to the registry?.”

Backup Registry
Backup Registry

8. Select Fix All Selected Issues once backup is completed.

Method #12 Limit CPU Usage for MsMpEng.exe

This method is one of the easiest one out of all. You just need to limit the CPU usage for the process MsMpEng.exe. Doing so, it won’t eat complete resources of your system. Simpy, follow the steps given below:

  1. Navigate to Task Manager>Details.

2. Locate MsMpEng.exe & right-click on it.

3. Select Set affinity>Select the CPU limit threshold.

Set Affinity
Set Affinity

4. You’re done.

Conclusion

Now you know the cause of slow and delayed responses from your operating system and how to fix it. So basically Antimalware Service Executable wants to stay in the limelight, exploiting all your system’s assets. But now we have bundled up all the possible ways to fix its high CPU usage error, out of which one will surely help you.

TIP: If none of the Methods worked for you, we strongly recommend using Reimage Repair Tool which can scan your system to fix corrupt and missing files. This works most of the time when the issue is due to system corruption. Reimage will also optimize your PC for maximum & better performance. You can download Reimage by Clicking Here

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