How to Fix ‘Antimalware Service Executable’ High CPU Usage Problem?

“Antimalware Service Executable” may cause significant CPU consumption or computer slow down sometimes. It hogs a lot of storage space when you start Windows or launch the software, and the computer becomes laggy and not usable for some time.

When you visit a malicious website, the Antimalware Service Executable runs a scan to see whether any malware or spyware has been downloaded. It will tell you if something is wrong. In addition, your system is scanned for malware attacks in the background. It uses a lot of your computer’s processing power to perform its scans, which is why you see it consuming a lot of CPU on Windows.

So, the question is, whether this high processing task can be stopped? The answer is yes, and in this article, we’ll talk about that only.

What is “Antimalware Service Executable”?

Also known as MsMpEng.exe, it is part of Windows security, a default antivirus tool from Microsoft in Windows 10. It is a Real-time scanner, which scans files as they are downloaded to your computer and alerts the user if a suspicious file is found, is the goal of this operation.

The average size of this process is 14,100 bytes, which means it takes up very little space on your hard drive. It has been confirmed and tested to run successfully with Microsoft Windows since Msmpeng.exe is a digitally signed file.

1. Why it has high CPU Usage?

It is a part of your Windows Defender. With High Disk Usage, you’re getting the real-time functionality that’s intended to be continually monitoring your files and connections and other connected apps.

New files and applications that we download are constantly scanned to see whether they contain malware. It takes action swiftly, which brings us to the problem of excessive system usage. This may make your PC slow and in turn, frustrate you. But, it also provides a defense mechanism against the PC.

2. Should You Disable It?

No, you shouldn’t. In the absence of any alternative antivirus software, we do not recommend deactivating Microsoft Defender. You can’t even turn it off completely.

  • Open the Windows Security application
  • Select “Virus & Threat Protection,”
  • Click “Manage Settings” under Virus & Threat protection settings
  • Uncheck “Real-Time Protection,” and restart your computer.

But Microsoft Defender will reactivate itself after a short length of time if it does not find other anti-virus software on the system.

How To Fix Antimalware Service Executable in High CPU Usage?

The complete disabling of antimalware service executable may lead to virus intrusion on your PC. But it’s on you, if you are frustrated by the high CPU usage of your PC you can disable it for some time. There are some other options also. Here are some of them discussed.

1. Change Windows Defender’s Scheduling Options

As the real-time protection function is primarily responsible for this problem, one viable solution is to alter the Windows defender’s schedule. Fix the ‘antimalware service executable’ problem by following the steps shown below.

  • Press the Windows key + R to open the Run dialogue box.
  • In the Run dialogue box, type taskschd.msc and press enter.
  • On the left side of the menu,  on Task Scheduler Library Microsoft Windows.
  • On the left side, double-click on Windows Defender.
  • Double click on “Windows Defender Scheduled Scan”.
  • Disable “Run with highest privileges” by unticking the checkbox.
  • Uncheck all of the conditions from the list. Then, click OK.

2. Change the Exclusion List of Windows Defender

Every file on your computer is checked during a scan by Windows Defender, including the application itself. This may lead to some intriguing interactions and is a typical cause of system lagging. Windows Defender may be instructed to skip itself during a system scan to avoid this lag.

  • Open Windows Task Manager by pressing Ctrl + Shift + Esc.
  • Look for it in the list of processes. Open the file location by right-clicking on the process.
  • The complete path to Antimalware Service Executable may be found in the address bar.
  • Copy the complete address by clicking on the address bar.
  • Open the start menu and type windows defender. Click on the top result to launch the windows defender security center.
  • Click on Virus & Threat protection. And then click on “Virus & Threat protection settings”.
  • Scroll down until you find “Exclusion”.
  • Click on “Add or delete exclusions”.
  • To add an exclusion, choose Folder, and put the path to MsMpEng.exe in the address bar of the previous screen you copied.
  • Finally, click Open and the folder will no longer be scanned.

3. Disable Windows Defender

If the problem remains after following the first two methods, you may want to disable Windows Defender. Installing anti-virus software before deleting Windows Defender is crucial. As, without it, your computer is open to intrusions of viruses.

  • Press the Windows key + R to open the Run dialogue box.
  • In the Run dialogue box, type Regedit and press enter.
  • On the left side of the pane, navigate as given here – HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender.
  • The next step is very important. Firstly, if you find a registry named DisableAntiSpyware, double click on it and type 1 in its value. If no such registry is found, right-click on the main registry pain and select New > DWORD (32 bit) Value.
  • Put its name as “DisableAntiSpyware” and now put its value as 1.

Also Read: How to Fix WiFi Keeps Disconnecting Issue?


That’s all the solutions for your high CPU usage. Antimalware service executable may sometimes make your PC laggy but above are the methods you can try to fix it. I hope you like the article. In case of any doubt, do let us know by commenting down.

Leave a Reply

Your email address will not be published. Required fields are marked *

You May Also Like