All About msseces.exe High CPU Usage

All About msseces.exe High CPU Usage

Messeces.exe is a critical process for Windows operating systems that is responsible for managing the security settings on a user’s computer. However, in recent times, several users have reported experiencing high CPU usage due to this process, leading to slow system performance and freezing issues. This article aims to provide an in-depth understanding of what msseces.exe is, why it may cause high CPU usage, and how to troubleshoot and resolve this issue. By the end of this article, readers will have a better understanding of msseces.exe and be equipped with the necessary knowledge to tackle high CPU usage caused by this process.

Fix: msseces.exe High CPU Usage

Fix: msseces.exe High CPU Usage

If you are experiencing a high CPU usage issue with the msseces.exe process, you may be wondering what this process is and how to fix the problem. Msseces.exe is a process associated with Microsoft Security Essentials, a popular antivirus program. This process is responsible for monitoring and updating the antivirus program, which can lead to high CPU usage under certain circumstances. To fix this issue, you can try these solutions:

1. Restart your computer

The first and simplest solution for any tech problem is to restart your computer. Sometimes, the msseces.exe process may get stuck or overloaded, causing the high CPU usage. A simple restart can fix this issue.

2. Update Microsoft Security Essentials

An outdated version of Microsoft Security Essentials may also cause high CPU usage. Make sure to check for updates and install them if available. To do this, open Microsoft Security Essentials, go to the Settings tab, and click on the Update tab. Then click on the Update button. This will ensure that your antivirus program is up to date and can help reduce CPU usage.

3. Perform a full system scan

Another reason for high CPU usage by msseces.exe could be due to a virus or malware infection. Performing a full system scan with Microsoft Security Essentials can help detect and remove any malicious programs that may be causing the issue.

4. Change the Microsoft Security Essentials schedule

The default setting for Microsoft Security Essentials is to scan the computer every day at a specific time. This can lead to high CPU usage, especially if the scan takes a long time. You can change the schedule to a less busy time, such as late at night when you are not using your computer.

To change the schedule, open Microsoft Security Essentials and go to the Settings tab. Click on the Scheduled scan tab and select a different time or turn off the automatic scan altogether.

5. Add exclusions to Microsoft Security Essentials

If you notice that specific programs or files trigger high CPU usage, you can add them as exclusions in Microsoft Security Essentials. This will prevent the antivirus program from scanning or monitoring these files, reducing CPU usage.

To add exclusions, go to the Settings tab in Microsoft Security Essentials and click on the Excluded files and locations tab. Then click on the Add button and browse to the file or program you want to exclude.

6. Disable real-time protection

If none of the above solutions work, you can try temporarily disabling real-time protection in Microsoft Security Essentials. This will stop the antivirus program from monitoring your computer in real-time, which can reduce CPU usage.

To do this, open Microsoft Security Essentials and go to the Settings tab. Click on the Real-time protection tab and uncheck the box next to “Turn on real-time protection.” Remember to turn real-time protection back on after you are finished with the task that was causing high CPU usage.


In conclusion, msseces.exe is an essential process for Microsoft Security Essentials, but it can cause high CPU usage under certain circumstances. By following the solutions mentioned above, you can fix this issue and reduce CPU usage. If the problem persists, you may need to contact Microsoft support for further assistance. It is also recommended to keep your antivirus program up to date to ensure optimal performance.


In conclusion, msseces.exe high CPU usage can be a frustrating issue for users of Microsoft Security Essentials. However, understanding the causes and potential fixes for this problem can help alleviate the negative effects on computer performance and productivity. By regularly updating the software, monitoring system health, and utilizing alternative security programs, users can effectively manage and prevent excessive CPU usage from msseces.exe. As always, it is important to stay informed and seek out professional help if needed. With these measures in place, users can confidently enjoy the benefits of Microsoft Security Essentials without the burden of high CPU usage.

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