Fix Antimalware Service Executable

Resolving High CPU Usage Caused by Antimalware Service Executable

High CPU usage caused by Antimalware Service Executable can significantly impact your computer’s performance and hinder your overall user experience.

Antimalware Service Executable (also known as “MsMpEng.exe”) is an integral component of Microsoft Windows operating systems designed to provide real-time protection against various forms of malware. As the name suggests, it is an essential service responsible for running and managing the Windows Defender Antivirus program, which safeguards your computer from viruses, spyware, ransomware, and other malicious software threats.

The Antimalware Service Executable operates silently in the background, constantly monitoring your system for any suspicious activities or potentially harmful files. It leverages a combination of scanning techniques, behavioral analysis, and signature-based detection to identify and neutralize threats before they can wreak havoc on your system. By proactively scanning files, processes, and network connections, this service acts as a robust defense mechanism, ensuring the overall security and integrity of your computer.

With its comprehensive and up-to-date malware definitions database, the Antimalware Service Executable keeps itself informed about the latest threats circulating in the digital landscape. This allows it to effectively identify and respond to emerging malware strains, thereby offering a shield of protection to your computer and its sensitive data. By constantly adapting to new attack vectors and evolving threats, this service ensures that your Windows system remains resilient and secure in the face of an ever-changing threat landscape.

Antimalware Service Executable fix


Understanding Antimalware Service Executable

Before delving into the troubleshooting methods, it is important to understand what Antimalware Service Executable is and its role in your computer’s security. Antimalware Service Executable, also known as MsMpEng.exe, is a core component of Windows Defender, Microsoft’s built-in antivirus software.

Antimalware Service Executable constantly runs in the background, scanning files, monitoring activities, and protecting your computer against potential threats. However, in some cases, it can consume an excessive amount of CPU resources, causing high CPU usage and impacting your system’s performance.


Troubleshooting Methods


Adjusting Windows Defender’s scheduled scans

Windows Defender performs scheduled scans to ensure your computer stays protected. However, these scans can coincide with your regular computer usage, leading to high CPU usage. To address this issue:

  1. Launch Windows Defender Security Center.
  2. Go to Virus & Threat Protection and click on “Virus & Threat Protection Settings”.
  3. Scroll down to “Automatic Sample Submission” and turn it off.
  4. Next, click on “Quick Scan” or “Full Scan” based on your preference.
  5. Under “Scan Schedule,” click on “Advanced” and set a different time for scanning that doesn’t interfere with your regular activities.


Excluding certain files and folders

Windows Defender scans all files and folders by default, even those that may not require scanning. By excluding specific items, you can reduce the workload on the Antimalware Service Executable and alleviate high CPU usage:

  1. Open Windows Defender Security Center.
  2. Go to Virus & Threat Protection and select “Virus & Threat Protection Settings”.
  3. Scroll down to “Exclusions” and click on “Add or remove exclusions”.
  4. Choose whether to exclude a file, folder, file type, or process.
  5. Select the item you want to exclude and confirm the changes.


Optimizing Windows Defender

To optimize Windows Defender and reduce CPU usage, follow these steps:

  1. Launch Windows Defender Security Center.
  2. Go to Virus & Threat Protection and select “Virus & Threat Protection Settings”.
  3. Scroll down to “Virus & Threat Protection Updates” and click on “Check for Updates”.
  4. Ensure your Windows Defender is up to date, as outdated definitions can cause high CPU usage.
  5. Restart your computer after the update process completes.


Considering alternative antivirus solutions

If you continue to experience high CPU usage despite implementing the above steps, it might be worth considering alternative antivirus solutions:

  1. Explore reliable third-party antivirus software options available in the market.
  2. Research and choose a reputable antivirus program that suits your needs.
  3. Install the selected antivirus software on your computer.
  4. Remember to uninstall Windows Defender if you opt for a third-party solution.



Resolving high CPU usage caused by Antimalware Service Executable is crucial for improving your computer’s performance. By adjusting Windows Defender’s scheduled scans, excluding unnecessary files and folders, optimizing Windows Defender, or considering alternative antivirus solutions, you can effectively address this issue.

The Antimalware Service Executable plays a vital role in maintaining the security of your Windows computer. By serving as the backbone of Windows Defender Antivirus, it provides real-time protection against a wide range of malware threats, including viruses, spyware, and ransomware. With its continuous monitoring and scanning capabilities, it acts as a vigilant guardian, constantly on the lookout for any potential security risks that may compromise your system or personal data.

The Antimalware Service Executable’s ability to adapt and respond to new threats is crucial in an age where malware creators are constantly devising sophisticated techniques to infiltrate and exploit vulnerable systems. By regularly updating its malware definitions and employing advanced detection algorithms, this service ensures that your computer remains equipped with the latest defense mechanisms, thwarting even the most cunning of malware attacks.

It is important to note that, at times, the Antimalware Service Executable may consume significant system resources, leading to increased CPU and disk usage. However, these temporary resource spikes are a trade-off for the continuous protection it provides. If you encounter performance issues, you can adjust the service’s settings to optimize resource usage while maintaining adequate protection.

In essence, the Antimalware Service Executable is an indispensable component of Windows Defender Antivirus, safeguarding your system against malware threats in real-time. By staying vigilant, regularly updating its malware knowledge base, and employing sophisticated scanning techniques, it ensures that your computer remains secure and protected. Embracing its role as a proactive defender, this service contributes to a safer computing experience, allowing you to navigate the digital landscape with peace of mind.



I hold a Bachlors degree in Information Systems and have worked in technology for over 20 years. I currently work as a Network Engineer In Charlotte NC. I enjoy helping others navigate technology in an easy to understand way.

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About Me

Hi Everyone! My name is Adam, I am the Editor of Wally Home. I hold a bachelors degree in information systems and more then 20 years experience in technology. I am currently working as a Network Engineer in Charlotte NC. I love sharing my knowledge to help others with technology. I hope you find the information helpful and informative. Enjoy your stay!

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