What is CATSysDemon.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 CATSysDemon.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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CATSysDemon.exe file information

The process known as System belongs to software Dassault Systemes Software (version B16, B17, B18, B20, B14, B12) or Dassault Systemes Product by Dassault Systemes (

Description: CATSysDemon.exe is not essential for the Windows OS and causes relatively few problems. CATSysDemon.exe is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 49,152 bytes (27% of all occurrences), 35,840 bytes and 4 more variants. 
The program is not visible. The file is not a Windows core file. The program listens for or sends data on open ports to a LAN or the Internet. Therefore the technical security rating is 55% dangerous, however you should also read the user reviews.

Uninstalling this variant: It is possible to uninstall Dassault Systemes Software B17 or Dassault Systemes Software B16 from your computer using the Control Panel applet Uninstall a Program.

Recommended: Identify CATSysDemon.exe related errors

Important: Some malware camouflages itself as CATSysDemon.exe, particularly when located in the C:\Windows or C:\Windows\System32 folder. Therefore, you should check the CATSysDemon.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

hängt mit Catia zusammen
Systemdatei von CATIA
This process is used for backbone connection to the CAD system CATIA from Dassault Systemes
System file for CATIA from Dassault Systems
This exe file is used to make startup easier and faster fot CATIA software
It aids the startup of DS CATIA
Listening on TCP-Port (Standard: 55555)

Rating chart

Summary: Average user rating of CATSysDemon.exe: based on 8 votes with 7 user comments. 4 users think CATSysDemon.exe is essential for Windows or an installed application. 2 users think it's probably harmless. 2 users think it's neither essential nor dangerous.

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Best practices for resolving CATSysDemon issues

A clean and tidy computer is the key requirement for avoiding problems with CATSysDemon. This means running a scan for malware, cleaning your hard drive using cleanmgr and sfc /scannow, uninstalling programs that you no longer need, checking for Autostart programs (using msconfig) and enabling Windows' Automatic 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 resmon 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 DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To help you analyze the CATSysDemon.exe process on your computer, the following programs have proven to be helpful: Security 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. Malwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

CATSysDemon.exe [all]