Antimalware Service Executable (MsMpEng.exe) High CPU usage Fix

Antimalware Service Executable is the name of the process MsMpEng (MsMpEng.exe) used by the Windows Defender program. The service associated with this program is the Windows Defender Service. The two most common reasons for it to be consuming high CPU usage are the real-time feature which is constantly scanning files, connections and other related applications in real-time, which is what it is supposed to be doing (Protect In Real Time).

What is Antimalware service executable?

You may know Windows Defender in your Windows, it’s an antivirus software built-in Windows 10. Antimalware Service Executable is one of the background-running services in Windows Defender. It’s also known as MsMpEng.exe, you can find this on the Details tab in your Task Manager.

 Antimalware Service Executable is running to scan the malware and spyware when you access them. It will detect if there’s anything harmful. Besides, it also takes a background scan of your system for any viruses or worms. Its scanning relies heavily on your computer’s CPU, that’s why you find it’s eating the CPU usage on your Windows 10. Couldn’t we solve this problem for the safety of our Windows? No, you can solve it.

How to stop Antimalware service executable?

To fix the high CPU usage issue caused by Antimalware Service Executable, you can try the following methods.

Solution 1. Change Windows Defender’s Scheduling Setting

Step 1. Type task scheduler in the Windows search box and choose the best match to launch the program.

Step 2. In the navigation pane on the left, expand Task Scheduler Library. Then navigate to the following destination: Microsoft -> Windows -> Windows Defender.

Step 3. In the middle pane, double click Windows Defender Scheduled Scan.

Step 4. On the pop-up window, locate to the Conditions tab, uncheck all options and click OK. This step is to clear all your scheduled scans.

To protect your computer from malware and virus attacks, it is necessary to schedule some new scans in a way that system performance won’t be affected. The following steps will show you how to make it.

Step 5. Double click Windows Defender Scheduled Scan, select the Triggers tab and click New.

Step 6. Create a new scan schedule according to your needs and it won’t affect system performance. For example, you can set weekly scans at a time when you won’t be influenced by the increased CPU usage. Then click OK.

Step 7. Repeat the same for the three remaining schedules, namely, Windows Defender Cache Maintenance, Windows Defender Cleanup, and Windows Defender Verification in the Windows Defender folder.

Solution 2. Disable Windows Defender

Many Windows 10 users fix the Antimalware Service Executable high CPU usage issue by disabling the Windows Defender. If there is another anti-virus software installed on your PC, you can disable Windows Defender. If not, you can also install a new anti-virus program with less CPU usage after disabling Windows Defender.

Disable Windows Defender from Local Group Policy Editor

Step 1. Press Windows + R key on the keyboard to get the Run box. Then input gpedit.msc and hit Enter open Local Group Policy Editor.

Step 2. Then navigate to Computer Configuration -> Administrative Templates -> Windows Components -> Windows Defender. And double-click the Turn off Windows Defender setting.

Step 3. Then switch to the Enabled option to disable Windows Defender. Then you can click Apply followed by OK.

Disable Windows Defender from the Registry

Step 1. Press the Windows and R key on the keyboard to open the Run box. Then type Regedit in the box and hit Enter to open Windows Registry.

Step 2. Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender.

Step 3. If there is a registry entry named DisableAntiSpyware, double click it and change its value to 1.

After disabling the Windows Defender, the CPU usage will return to normal.

Video Tutorial:

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