What is mcsysmon.exe?

The .exe extension on a filename indicates an executable file. Executable files may, in some cases, harm your computer. Therefore, please read below to decide for yourself whether the mcsysmon.exe on your computer is a Trojan that you should remove, or whether it is a file belonging to the Windows operating system or to a trusted application.

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Mcsysmon.exe file information

Windows Task Manager with mcsysmon
Mcsysmon.exe process in Windows Task Manager

The process known as McAfee SystemGuards Service belongs to software McAfee VirusScan API or McAfee Virtual Technician by McAfee (

Description: Mcsysmon.exe is not essential for the Windows OS and causes relatively few problems. The mcsysmon.exe file is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 695,624 bytes (66% of all occurrences), 606,736 bytes, 605,512 bytes or 643,664 bytes. 
The program is not visible. The mcsysmon.exe file is a Verisign signed file. The file is digitally signed. It is not a Windows core file. Mcsysmon.exe is able to monitor applications. Therefore the technical security rating is 21% dangerous, however you should also read the user reviews.

Uninstalling this variant: If you want to remove the program completely, go to Control Panel ⇒ Software ⇒ McAfee Virtual Technician.

Recommended: Identify mcsysmon.exe related errors

Important: Some malware camouflages itself as mcsysmon.exe, particularly when located in the C:\Windows or C:\Windows\System32 folder. Therefore, you should check the mcsysmon.exe process on your PC to see if it is a threat. We recommend Security Task Manager for verifying your computer's security. This was one of the Top Download Picks of The Washington Post and PC World.


User Comments

it can slow down cpu speed
It throttles up my processor to 100% and wont let aol sign on.
Belongs to Mc Afee AV program. It is a resource hog. Look in the task manager to see how it is affecting your system.
  Jack Spence  

Summary: Average user rating of mcsysmon.exe: based on 3 votes with 3 user comments. 2 users think mcsysmon.exe is essential for Windows or an installed application. One user thinks it's neither essential nor dangerous. One user is not sure about it.

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Best practices for resolving mcsysmon issues

A clean and tidy computer is the key requirement for avoiding problems with mcsysmon. This means running a scan for malware, cleaning your hard drive using 1cleanmgr and 2sfc /scannow, 3uninstalling programs that you no longer need, checking for Autostart programs (using 4msconfig) and enabling Windows' 5Automatic Update. Always remember to perform periodic backups, or at least to set restore points.

Should you experience an actual problem, try to recall the last thing you did, or the last thing you installed before the problem appeared for the first time. Use the 6resmon command to identify the processes that are causing your problem. Even for serious problems, rather than reinstalling Windows, you are better off repairing of your installation or, for Windows 8 and later versions, executing the 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To help you analyze the mcsysmon.exe process on your computer, the following programs have proven to be helpful: ASecurity Task Manager displays all running Windows tasks, including embedded hidden processes, such as keyboard and browser monitoring or Autostart entries. A unique security risk rating indicates the likelihood of the process being potential spyware, malware or a Trojan. BMalwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

mcsysmon.exe [all]