How to Resolve Antimalware Service Executable High CPU Usage issue?

How to Resolve Antimalware Service Executable High CPU Usage issue?

Steps to resolve Antimalware Service Executable in Windows 10

How-To PC Optimization

Windows 10 is undoubtedly one of the best-operating systems, but sadly it is not free from issues, and one of the errors that the users face is antimalware service executable and high CPU usage issue. The words “Malware” in the error does not mean your computer is infected with a virus but rather this error is caused by the default Antivirus app of Windows 10, commonly known as Windows Defender which was recently rechristened as Windows Security.

Also Read: PC Cleaner free download for Windows 10

What Exactly Is Antimalware Service Executable And High Cpu Usage Issue?

When you face the issue of antimalware service executable in Windows 10, a process known as msmpeng.exe causes spikes in the processes of task manager resulting in high CPU usage. The msmpeng.exe process is not a malicious process or a virus but a part of the bundle of security services, collectively known as antimalware service executables.

High CPU Usgae

As this is a legit Windows service, the issues caused by antimalware service executable in Windows 10 cannot be resolved by Windows Troubleshooter or any third-party tool. After a lot of research by the global community, the issue has been narrowed down to a particular file by the name of mpenginedb.db which again is not a virus but one of the system files used by Windows Defender to store certain values. This file contains a database of identifiers some of which act as False-Positive and forces Windows Defender to keep scanning the computer in a never-ending loop. The continuous scanning results in the system resources being consumed unnecessarily, and this results in high CPU usage.

The only solution identified so far is to delete the mpenginedb.db file, which will fix the issue of both antimalware service executable and high CPU usage.

high CPU usage

Also Read: Fix- Svchost.Exe High CPU Usage On Windows 10

Steps to Resolve Antimalware Service Executable and High CPU Usage Issue in Windows 10

As mentioned earlier, the only possible solution to fix antimalware service executable and high CPU usage issue is to delete the Mpengine.db file. However, as this file is a system file of the Windows 10 operating system. It cannot be deleted in the way other files are deleted. You won’t be able to select the file and press the delete button on the keyboard and the file moves to the recycle bin. To delete this file, follow these steps:

Step 1. Disable the Antivirus process running in your computer by typing Windows Security in the search box on the bottom left of your taskbar.

Step 2. From the search results open the corresponding app of the same name.

Step 3. Once the App is opened on your desktop, Choose “Virus and threat protection” from the list on the left side.

Step 4. Among the options mentioned on the right side of the Windows Security app window, locate “Manage Settings” and click on it.

Virus and threat protection

Step 5. From the new options displayed, turn every option off by disabling the toggle switch under each title.

Also Read: How To Free Up RAM On your Windows 10, 8, 7 PC


Step 6. Once all the toggles are turned off, close all the open windows, save any pending work and Restart the computer. Remember to press and hold the Shift key before restart, and hold it until the computer boots to Advanced Recovery Window.

Step 7. Now that the computer has rebooted in Recovery mode, choose Troubleshoot -> Advanced Options -> Startup Settings -> Restart. Remember to press and hold the number “4” key to boot in safe mode.

Step 8. Wait for the computer to boot in Safe Mode, and then type Registry in the search box on the toolbar. The search results will display the Registry Editor App in the search results.

Step 9. Right-click on the result, and then click “Run as Administrator”.

Run as administrator

Step 10. In the registry window, copy the path mentioned below and paste it in the address bar just below the File tab. Press Enter to reach the correct path required.

HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender

Step 11. Now, right-click on the folder labeled as Windows Defender. From the list of options that appear, select New and choose DWORD (32-bit) value. A file will be created and rename the file as “DisableAntiSpyware,” and click on the “Ok” button.

Registry Editor

Step 12. Once the file is created, you need to double-click on the file and locate the option to change the value from 0 to 1. Click the Ok button, and restart the computer.

Step 13. Once your computer is restarted, type PowerShell in the search box located on the bottom left of the taskbar. From the search result, open the PowerShell app as an Administrator to enable full power and access.

Step 14. The PowerShell window resembles the command prompt window but is Blue and white in color as compared to black and white. Type the command below and paste it in PowerShell, and hit the enter key on the keyboard.

Remove-Item ‘C:\ProgramData\Microsoft\Windows Defender\Scans\mpenginedb.db’

Step 15. The Mpengine.db system file will now be deleted from your system.

Step 16. Reopen the Registry app again by following steps 8 to 11. You don’t need to boot in Safe mode this time. Once you locate the file, you created a few minutes ago and renamed it “DisableAntiSpyware”, do a right-click on that file and delete it.

That was the final step, and the antimalware service executable and high CPU usage issues have finally been resolved. Restart your computer, and the Windows Security will reactivate without Mpengine.db or msmpeng.exe process, causing any father issues.

If you still find issues with CPU spikes, then it is best you disable the Windows Security permanently and install a third-party total security software like Advanced System optimizer, which can not only protect your system from all types of malicious software, but also optimize your system and delete all the unnecessary files, and help enhancing your computer’s performance.

Download Advanced System Optimizer now.

Also Read: 5 Tips to Fix 100% Disk Usage on Windows 10

The final word on Antimalware Service Executable and High CPU Usage Issue.

Those were the steps to resolve the error of antimalware service executable in Windows 10, and the high CPU usage issue that occurs side by side. Although the steps to follow are lengthier than usual and the process seems to be difficult, you can complete it successfully provided you read it all first, and then follow each step without skipping anyone in between. If you still face issues and are not able to resolve the issue, then do mention in the comments section below, and we would respond back with the best possible solution.
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