What is msmpeng.exe? High CPU Disk Usage & 10 Fix Ways

Unleashing the Hidden Culprit: Unraveling the Mysteries of msmpeng.exe and Resolving High CPU Disk Usage with 10 Effective Remedies

Disable Windows Defender Real-time Protection: msmpeng.exe is a process associated with Windows Defender. If you experience high CPU usage or slow performance due to msmpeng.exe, you can try disabling real-time protection temporarily. Open Windows Security settings, go to Virus & Threat Protection, and toggle off “Real-time protection.

Understanding msmpeng.exe

Msmpeng.exe, also known as Antimalware Service Executable, is a part of Windows Defender, the native antivirus program in Windows 10. It functions as a real-time protection against viruses and threats in the background. However, some users may experience high CPU and disk usage due to Msmpeng.exe. To fix this issue, you can try the following steps:

1. Open Task Manager by pressing Ctrl+Shift+Esc.
2. Go to the “Details” tab and locate MsMpEng.exe.
3. Right-click on it and select “Set affinity”.
4. Uncheck all the CPU boxes except one and click “OK”.
5. If the issue persists, you can disable Msmpeng.exe temporarily by following these steps.
6. Open Task Scheduler by pressing Windows key + R, then type “taskschd.msc” and press Enter.
7. Expand “Task Scheduler Library” > “Microsoft” > “Windows” > “Windows Defender”.
8. Right-click on “Windows Defender Scheduled Scan” and select “Disable”.
9. Restart your computer.

These fixes should help alleviate the high CPU and disk usage caused by Msmpeng.exe.

msmpeng.exe is a critical process for Windows Defender, ensuring computer security and protecting against malware.

Causes of high CPU usage by msmpeng.exe

Msmpeng.exe, also known as Antimalware Service Executable, is a native Windows 10 Antimalware service executable that protects your PC from threats. However, it can sometimes cause high CPU disk usage, slowing down your computer. This issue is often caused by a virus or the program scanning too much. To fix this, try the following solutions:
1. Open Task Manager by pressing Ctrl + Shift + Esc and end the process.
2. Disable msmpeng.exe in Windows Security or Microsoft Defender settings.
3. Exclude certain folders or file types from being scanned.
4. Update your antivirus software and run a full scan.
These fixes should help reduce high CPU usage caused by msmpeng.exe and improve your computer’s performance.

Methods to prevent Windows Defender from scanning its own folder

  1. Open Windows Security by clicking on the Start button and selecting Settings. Then, click on Update & Security and choose Windows Security.
  2. Click on Virus & threat protection and select Manage settings.
    Open Windows Security by clicking on the Start button and selecting Settings. Then, click on Update & Security and choose Windows Security.
Click on Virus & threat protection and select Manage settings.
  3. Scroll down and click on Add or remove exclusions.
  4. Click on Add an exclusion and select Folder.
  5. Browse and locate the Windows Defender folder in your system. The default location is usually C:\Program Files\Windows Defender.
  6. Select the folder and click on Open to exclude it from scanning.
    Browse and locate the Windows Defender folder in your system. The default location is usually C:\Program Files\Windows Defender.
Select the folder and click on Open to exclude it from scanning.

Method 2: Disable Real-time Protection temporarily

  1. Open Windows Security by clicking on the Start button and selecting Settings. Then, click on Update & Security and choose Windows Security.
  2. Click on Virus & threat protection and select Manage settings.
    Open Windows Security by clicking on the Start button and selecting Settings. Then, click on Update & Security and choose Windows Security.
Click on Virus & threat protection and select Manage settings.
  3. Toggle the Real-time protection switch to the Off position to temporarily disable it.

Method 3: Change Windows Defender’s Scheduled Scan Settings

  1. Open Windows Security by clicking on the Start button and selecting Settings. Then, click on Update & Security and choose Windows Security.
  2. Click on Virus & threat protection and select Manage settings.
    Open Windows Security by clicking on the Start button and selecting Settings. Then, click on Update & Security and choose Windows Security.
Click on Virus & threat protection and select Manage settings.
  3. Scroll down and click on Manage settings under Automatic sample submission.
  4. Toggle the Automatic sample submission switch to the Off position.
  5. Go back to the main Windows Security window.
  6. Click on Virus & threat protection and select Scan options.
    Go back to the main Windows Security window.
Click on Virus & threat protection and select Scan options.
  7. Click on Windows Defender Offline scan and toggle the switch to the Off position.
  8. Close the Windows Security window.

Method 4: Use Group Policy Editor to Exclude Windows Defender Folder

  1. Press Windows Key + R to open the Run dialog box.
  2. Type gpedit.msc in the dialog box and press Enter to open the Group Policy Editor.
    Press Windows Key + R to open the Run dialog box.
Type gpedit.msc in the dialog box and press Enter to open the Group Policy Editor.
  3. In the Group Policy Editor, navigate to Computer Configuration > Administrative Templates > Windows Components > Windows Defender Antivirus > Exclusions.
  4. Double-click on Exclude files and folders in the right-hand pane.
  5. Select Enabled and click on Show under Options.
  6. Click on Add and enter the path to the Windows Defender folder (C:\Program Files\Windows Defender by default).
    Select Enabled and click on Show under Options.
Click on Add and enter the path to the Windows Defender folder (C:\Program Files\Windows Defender by default).
  7. Click on OK to save the changes.
  8. Close the Group Policy Editor.

Solutions to disable real-time protection and reschedule Windows Defender scans

  1. Open Windows Security by clicking on the Start menu, selecting Settings, and then clicking on Update & Security.
  2. In the Windows Security window, click on Virus & threat protection.
  3. Under Virus & threat protection settings, click on Manage settings.
  4. Toggle the switch under Real-time protection to the Off position.
    Under Virus & threat protection settings, click on Manage settings.
Toggle the switch under Real-time protection to the Off position.

Solution 2: Reschedule Windows Defender scans

  1. Open Windows Security by clicking on the Start menu, selecting Settings, and then clicking on Update & Security.
  2. In the Windows Security window, click on Virus & threat protection.
  3. Under Virus & threat protection settings, click on Manage settings.
  4. Scroll down to the Automatic sample submission section and click on Manage sample submission.
    Under Virus & threat protection settings, click on Manage settings.
Scroll down to the Automatic sample submission section and click on Manage sample submission.
  5. Under Sample submission settings, toggle the switch under Automatically send samples when further analysis is required to the Off position.
  6. Go back to the Windows Security window and click on App & browser control.
  7. Under App & browser control settings, click on Reputation-based protection settings.
  8. Toggle the switch under Submit potentially unwanted apps for analysis to the Off position.
    Under App & browser control settings, click on Reputation-based protection settings.
Toggle the switch under Submit potentially unwanted apps for analysis to the Off position.

Steps to remove or disable msmpeng.exe in Windows 10

1. Open Task Manager by pressing Ctrl+Shift+Esc.
2. Go to the “Processes” tab and locate msmpeng.exe.
3. Right-click on msmpeng.exe and select “Open file location.”
4. This will open the folder where msmpeng.exe is located.
5. Rename the msmpeng.exe file by adding “.old” at the end of the filename.
6. If prompted for administrator permission, click “Continue.”
7. Restart your computer to apply the changes.

Note: Disabling msmpeng.exe may leave your computer vulnerable to malware. Consider using alternative antivirus software or troubleshooting the issue with Microsoft support if the problem persists.

Effective fixes for reducing CPU usage by msmpeng.exe

  • Update Windows Defender: Keeping Windows Defender up to date ensures that the latest bug fixes and optimizations are applied, potentially reducing CPU usage caused by msmpeng.exe.
  • Perform a full system scan: Running a thorough scan with Windows Defender can help identify and eliminate any malware or potentially unwanted programs that may be causing high CPU usage.
  • Exclude specific files or folders from scanning: By excluding certain files or folders from Windows Defender scans, you can prevent msmpeng.exe from consuming excessive CPU resources when accessing those excluded items.
  • Adjust Windows Defender’s scanning schedule: Modifying the scanning frequency and timing allows you to strike a balance between system protection and CPU usage, reducing the impact of msmpeng.exe on your computer’s performance.
    Exclude specific files or folders from scanning: By excluding certain files or folders from Windows Defender scans, you can prevent msmpeng.exe from consuming excessive CPU resources when accessing those excluded items.
Adjust Windows Defender's scanning schedule: Modifying the scanning frequency and timing allows you to strike a balance between system protection and CPU usage, reducing the impact of msmpeng.exe on your computer's performance.
  • Disable real-time protection temporarily: Disabling real-time protection in Windows Defender can provide immediate relief from high CPU usage caused by msmpeng.exe, but remember to re-enable it later to maintain continuous protection.
  • Use an alternative antivirus solution: If msmpeng.exe consistently utilizes excessive CPU resources, consider switching to a different antivirus program that suits your needs while ensuring minimal impact on system performance.
    Disable real-time protection temporarily: Disabling real-time protection in Windows Defender can provide immediate relief from high CPU usage caused by msmpeng.exe, but remember to re-enable it later to maintain continuous protection.
Use an alternative antivirus solution: If msmpeng.exe consistently utilizes excessive CPU resources, consider switching to a different antivirus program that suits your needs while ensuring minimal impact on system performance.
  • Check for conflicting software: Certain third-party security software or utilities may conflict with Windows Defender, causing msmpeng.exe to consume more CPU. Identify and remove any conflicting programs to resolve the issue.
  • Update device drivers: Outdated or incompatible device drivers can sometimes trigger high CPU usage. Make sure to regularly update drivers to their latest versions, especially those related to hardware security components.
  • Optimize system resources: Close unnecessary background applications, limit startup programs, and free up disk space to optimize your system’s overall performance, potentially reducing the strain on CPU resources caused by msmpeng.exe.
  • Contact Microsoft Support: If none of the above fixes resolve the high CPU usage issue with msmpeng.exe, reach out to Microsoft Support for further assistance and expert guidance.
    Optimize system resources: Close unnecessary background applications, limit startup programs, and free up disk space to optimize your system's overall performance, potentially reducing the strain on CPU resources caused by msmpeng.exe.
Contact Microsoft Support: If none of the above fixes resolve the high CPU usage issue with msmpeng.exe, reach out to Microsoft Support for further assistance and expert guidance.
Was this article helpful?
YesNo