MsMpEng.exe: How To Fix High CPU Usage On Windows

On Windows 10, MsMpEng.exe may cause excessive CPU utilization, rendering your computer nearly unusable. This process is part of Windows Defender and isn’t a virus, but that doesn’t rule out the possibility that malware is to blame. The built-in antivirus can be disabled by adjusting its settings to prevent it from scanning its own files. Installing a new, the more reliable antivirus program can potentially help you fully avoid this problem.

MsMpEng.exe High CPU Usage On PC: How To Fix It?

MsMpEng.exe can cause a lot of CPU use on Windows machines, which can lead to other problems. We’ll cover everything you need to know about this procedure, as well as how to resolve some of the most typical problems it causes, in this article. What is MsMpEng.exe and what does it do? Is it a computer virus? MsMpEng.exe is a Windows Defender core process. It’s not a virus, either.

Its job is to examine downloaded files for spyware and quarantine or delete any questionable files. It also checks your computer for known worms, malicious software, viruses, and other malware. Is it possible to disable MsMpEng.exe? Many Windows users have claimed that MsMpEng.exe causes significant CPU and RAM consumption, sometimes exceeding 80 percent, regardless of the Windows version they are using.

Why Is MsMpEng.exe Using So Much CPU?

A number of factors can cause this strange behavior of msmpeng.exe. The utility could, for example, be scanning its own directory. Low hardware resources or obsolete antivirus registry files could also be factors. Of course, it might also be a case of malware on your computer.

There are several free and commercial antivirus applications to select from, and you may delete Windows Defender at any time and replace it with a more reliable antivirus. However, you should try the remedies listed below to resolve the problem before making such a choice based on msmpeng.exe’s high CPU utilization. Our customers have claimed that MsMpEng.exe causes significant CPU and RAM use, sometimes exceeding 80 percent, regardless of the Windows version they are using.

1. Prevent Windows Defender 

In the search bar, type Windows Security and then select Windows Security from the list of results.

  1. Choose Virus and Threat Protection from the drop-down menu.
  2. Under Virus & Threat Protection Settings, select Manage settings.
  3. Scroll down to Exclusions and select Add or delete exclusions.
  4. Select Add an exclusion and select Folder as the destination.
  5. Choose C:Program files windows defender.
  6. Validate by selecting Exclude this folder from the drop-down menu.

This technique will stop Windows Defender from scanning its own files, so give it a shot.

2. Limit CPU Usage

  1. Select Task Manager from the list by right-clicking the Start button.
  2. Select the Details tab from the drop-down menu.
  3. Set affinity by right-clicking msmpeng.exe.
  4. Select the cores that the process is permitted to use.

You can reduce the processing power allocated to the process by following the instructions above, which means you won’t have to deal with a high CPU consumption on that process.

3. Start Your Computer in Safe Mode

For use with Windows 10

  1. Go to the Settings menu.
  2. Then, under Update & Security, select Recovery.
  3. Select Restart Now from the Advanced starting menu.
  4. When your computer restarts, go to the Choose an option page and select Troubleshoot, then Advanced Options, Startup Settings, and Restart.

Step 5: Then, You will presented with a menu of choices. To start your computer in Safe Mode, press F4.

For Windows 7, version 4.2

  1. Your computer should be restarted.
  2. Before the Windows logo shows, press F8 while your machine is rebooting.
  3. Select Safe Mode with Networking and click Enter when the Windows Advanced Options Menu comes on the screen.

If you’re still using Windows 7, follow the steps above to start your computer in Safe Mode.

4. Remove Adware

As evidenced by several results when searching for msmpeng.exe, the high CPU consumption side effect appears to be a rather widespread issue, and it could be a source of potentially harmful malware. Because adware can cause this problem, you should consider utilizing specialized software to eliminate it.

In the past, the MsMpEng.exe process has been hijacked by malware, adware, or a virus infection. In this case, you should do a thorough scan of your PC with reputable anti-malware and anti-adware software to guarantee that no hidden threats are assaulting the system’s core. The software will scan your system in a matter of seconds, identifying and removing any annoyances from your computer.

Always remember to take back up all of your important information, personal data files, and photographs to an external device. Certain infections may render your computer useless during or before the removal process.

5. Reschedule Windows Defender

Enter task scheduler by pressing Windows Key + S. From the list of results, choose Task Scheduler.

  1. Navigate to Task Scheduler Library > Windows Defender in the left pane when Task Scheduler launches.
  2. Double-click Windows Defender Scheduled Scan in the right pane.
  3. Go to the Conditions tab in the Properties window when it opens. Make sure the choices to Start the task only if the computer is idle, Start the task only if the computer is on AC power, and Start only if the following network connection is accessible are all turned off. To save the changes, click OK.
  4. Return to the Properties window and select the Triggers tab. To begin, select New.
  5. Select the desired properties and choose Weekly or Monthly. When you’re finished, click OK to save your changes.
  6. Return to Task Scheduler and apply the identical modifications to all Windows Defender tasks. Windows Defender Cache Maintenance, Windows Defender Cleanup, and Windows Defender Verification should be the only tasks left.
  7. Windows Defender sometimes causes MsMpEng.exe and significant CPU utilisation. To resolve this issue, repeat the procedures above to reschedule Windows Defender.

This is a more complicated solution, but if you follow our instructions carefully, you should be able to complete it. Keep in mind that excessive CPU utilization will return when Windows Defender starts scanning.

You can, however, arrange the scan to take place once a month to avoid this issue.If you don’t like the built-in scheduler, check out our list of the best Windows task scheduler software and replace it with something better.

6. Disable Windows Defender

Always Use the Group Policy Editor to make changes.

  1. Enter gpedit.msc by pressing Windows Key + R. Click OK or press Enter.
  2. The Group Policy Editor will launch now. Keep in mind that this feature is only available on Windows Pro and Enterprise.
  3. Navigate to Computer Configuration in the left pane, then Administrative Templates, Windows Components, then Windows Defender Antivirus.
  4. Double-click Turn off Windows Defender Antivirus in the right pane.
  5. Select Enabled in the Properties window that appears, then click Apply and OK to save your changes.

You won’t be able to use the Group Policy Editor if you have a home version of Windows. You can, however, install it at any moment. Here’s an excellent resource for learning how to do it.

Use the Registry Editor

  • Enter regedit by pressing Windows Key + R. Click OK or press Enter.
  • Scroll to the following path in the left pane when the Registry Editor opens:

HKEY_LOCAL_MACHINESOFTWAREPoliciesMicrosoftWindows Defender

  • Look for the DisableAntiSpyware DWORD in the right pane. If this DWORD isn’t already there, right-click the empty spot and select New, then DWORD (32-bit) Value from the menu. Now double-click the new DWORD and give it the name DisableAntiSpyware.
  • To save the changes, set the Value data to 1 and click OK.

If you are unable to launch Group Policy Editor on your computer, you may be able to resolve the issue by editing your registry. Follow the methods outlined above to accomplish this.

If you’re still having issues with MsMpEng.exe and high CPU utilisation, you may be able to solve the problem by just turning off Windows Defender. Install a third-party antivirus software before disabling Windows Defender to protect your computer. Windows Defender will be disabled as a result of the adjustments, and the issue should be rectified.

7. Disable Sample Submission

Step 1: Navigate to the Update & security section of the Settings app.

  1. Go to the left-hand menu, select Windows Security, and click Open Windows Security.
  2. Select Virus and Threat Protection from the drop-down menu.
  3. Under Virus & Threat Protection Settings, select Manage settings.
  4. Turn off Automatic sample submission by looking for it.

According to users, the Sample Submission feature can cause issues with msmpeng.exe’s high memory and CPU use. In addition, this feature reports questionable files to Microsoft for further investigation.

Although this is a beneficial procedure, it can result in issues. We must first disable this feature by following the steps outlined above to resolve this issue. After then, check to see if the problem has been resolved. Under Virus & Threat Protection Settings, select Manage settings.

Final Words:

We hope that by following the steps outlined above, you were able to solve this vexing problem. Because this is an antivirus issue, you should also look at our list of the top antiviruses for your PC with limitless license validity and select the best solution for you.

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