How to Fix High CPU Usage By MsMpEng.exe in Windows 10 - Pdf Slider

How to Fix High CPU Usage By MsMpEng.exe in Windows 10

How to Fix High CPU Usage By MsMpEng.exe in Windows 10

Use the following fixes to reduce the Antimalware Service Executable's high CPU use. The most recent Windows 10 update was used to write our procedures.

Fix #1: Scan your Razer Computer for Malware

To be sure that your system is not currently compromised with malware, we advise conducting a security scan. It's possible for some malicious scripts and programs to increase Windows Defender's memory consumption. You can also be a target of a cyberattack if you see high CPU and disc utilization.

We'll run a system scan using the available and integrated Windows Defender. A more specialized third-party antivirus program might function better, though. To check your Razer computer for malware using Windows Defender, perform the following steps:

  1. Open the search bar in your taskbar by clicking on the magnifying glass icon. You can also bring it up with the Windows + S keyboard shortcut.
  2. Type in Windows Security and launch it from the search results.

3.  Select the Full scan option. This will check every single file on your drives to ensure no threats can be hidden. Take note that this scan may last over 1-2 hours, depending on how many files you have on your system.

windows deefender full scan

4.  Click on the Scan now button to begin the scan. If a threat is detected, Windows 10 will automatically quarantine or remove it entirely. You can review the scan results afterward to see what infected files were removed.
windos defender

5.  Switch to the Virus & Threat Protection tab using the home screen or the menu in the left-side pane. Click on the Scan Options link.

Fix #2: Change Windows Defender Scheduling settings

A number of Windows users who report high CPU usage by MsMpEng.exe say it occurs during a full system scan. To sort these issues out, you can reschedule the scan to occur when you’re not using your Razer PC:

  1. Open Windows search and type Task Scheduler.
  2. On the Task Scheduler screen, navigate to the left pane and double-click Task Scheduler Library.
    Windows Task schduler
  3. Expand the folders as you navigate the following path:
    Library/Microsoft/Windows/Windows Defender.
    Windows Task Scheduler
  4. In the Windows Defender folder, locate Windows Defender Scheduled Scan in the middle pane and double-click on it.
  5. On the new Window, go to the Conditions tab, and then click OK and uncheck all options. This will clear the scheduled scans on your Razer PC.
    Windows Task Scheduler
  6. Now, reschedule the Windows Defender scans.
    Windows Task Scheduler
    1. Again double click the Windows Defender Scheduled Scan.
    2. Got to the Triggers tab and then click New.
    3. Next, create a new scan schedule - either weekly scans or monthly scans depending on what suits your needs and enables you to balance protection and system efficiency. 
    4. Now, choose the Day of the scan and click OK. Make sure the scan is enabled.
    5. Repeat the same process for the other three services: Windows Defender Cleanup, Windows Defender Cache Maintenance,  and Windows Defender Verification.

This process will re-schedule your Razer PC’s Windows Defender to function as per your preference. Restart your PC and see if the Antimalware Service Executable is still using a high CPU. 

FIX #3: Add Antimalware Service Executable to the Windows Defender’s exclusion list

Windows Defender scans every file on your Razer PC, even itself, which frequently causes system slowdown. Simply adding Windows Defender to the exclusion list prevents it from being scanned by Windows Defender.

  1. Open Task Manager by pressing Ctrl + Shift + Esc (or right-click the Taskbar and select Task Manager).
  2. In the list of items, locate Antimalware Service Executable > right-click on it and select Open File Location.
    Windows Task Manager
  3. Copy the full path of Antimalware Service Executable on the address bar.
  4. Now, open the Windows Start menu and type “windows defender” then click the top result to launch Windows Defender Security Center.
  5. Next, click on Virus & threat protection > then on Virus & threat protection settings, click Manage settings.
  6. Now, scroll down to “Exclusions,” then click Add or remove exclusions. 
  7. Click Add an exclusion, select the Folder option, then paste the Antimalware Service Executable (MsMpEng.exe) path you copied from the address bar. 
  8. Now, click Open.

The Antimalware Service Executable folder will not be scanned as a result of this procedure. This method corrects a known problem with the scans that Windows Defender runs in real-time protection mode rather than removing the Antimalware Service Executable.

Fix #4: Disable Windows Defender Service

You might need to turn off Windows 10's Antimalware Service Executable if the issue with MsMpEng's high CPU consumption remains. If you don't already have a third-party antivirus application installed, be aware that uninstalling Windows Defender may leave you open to several cyberattacks.

When you're prepared, follow the detailed instructions below to completely disable Antimalware Service Executable.

To disable Windows Defender (through the registry editor):

  1. Press Wins Key + R to open Run Dialog Box.
  2. Type Regedit and click OK to open the Registry Editor.
  3. Check the left navigation pane, and double-click the folders to navigate to the following path:
    HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender.
  4. Locate a registry entry named DisableAntiSpyware > then double click it and set its value data to 1.
    1. If there is no registry entry named DisableAntiSpyware, go back to the main Registry Editor pane and right-click on it > select New > DWORD (32-bit) Value.
    2. Now, name the new registry entry DisableAntiSpyware > double click it and set its value data to 1.
      registry editor

Fix #5: Roll Back Windows Defender Definition Updates

In rare circumstances, Windows Defender may receive a subpar definition update, which results in the virus detection of specific Windows 10 files. If many false positives occur at once, your system may become easily overloaded. Here's how to uninstall a corrupt Windows Defender definition update.

  1. Open the search bar in your taskbar by clicking on the magnifying glass icon. You can also bring it up with the Windows + S keyboard shortcut.
  2. Type Command Prompt in the search box. When you see it in the results, right-click on it and choose Run as Administrator
  3. When prompted by the User Account Control (UAC), click Yes to allow the app to launch with administrative permissions.
    If you need help, check out our How to make a local user an administrator in Windows 10 guide.
  4. Once the Command Prompt window is open, type in the following command and press Enter to execute it: "%PROGRAMFILES%\Windows Defender\MPCMDRUN.exe" -RemoveDefinitions -All
  5. After the first command finishes running, input the following one and execute it with the Enter key: "%PROGRAMFILES%\Windows Defender\MPCMDRUN.exe" -SignatureUpdate
  6. You can now check if the Antimalware Service Executable (MsMpEng.exe) high CPU usage has decreased.

If you carefully follow the steps we’ve described in this article, you’ll take control of the Antimalware Service Executable on your Razer PC and keep your computer running at full speed. Aside from that, contact the Razer Repair Service Center USA if you need assistance with antimalware service or other software or setting issues. Our qualified staff team is always available to resolve your issues.


Also, Read Using the Razer Ripsaw HD, how can I fix the PS4's black screen (no signal)?

Sonia Sen

Sonia Sen

Repair Service Center

Sonia Sen is my name. I am an employee of a Brother repair service center in the US. In this position, I'm an SEO analyst. Every client's digital marketing effort falls under my purview. My team members have already worked on my project, which requires keyword research and submission to search engines for ranking purposes.


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