What is CnxDIAS.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 CnxDIAS.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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CnxDIAS.exe file information

Windows Task Manager with CnxDIAS
CnxDIAS.exe process in Windows Task Manager

The process known as Driver Information Assist Core Module belongs to software Driver Information Assist Service or Driver Information Asstst Service by CANON INC (

Description: CnxDIAS.exe is not essential for the Windows OS and causes relatively few problems. The CnxDIAS.exe file is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 1,171,532 bytes (17% of all occurrences), 1,245,260 bytes and 14 more variants. 
The program is not visible. The CnxDIAS.exe file is not a Windows core file. The program uses ports to connect to or from a LAN or the Internet. CnxDIAS.exe is able to record keyboard and mouse inputs, hide itself, connect to the Internet and monitor applications. Therefore the technical security rating is 50% dangerous, however you should also read the user reviews.

Recommended: Identify CnxDIAS.exe related errors

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

Is is installed with the Canon IR5000 Printer
My file size is: 1145KB located in the Prgm Files\Cannon\DIAS folder.
  Phil Karras  
This is Canon Driver Information Assist Service. This enables bi-directional communication between the print server and the Image Runner series of printer/copiers
    (further information)
The file is part of the Canon Device Information Assist Service (DIAS) which acts as a communications link via TCP/IP between a user's desktop, a print server and the Canon Multifunction Device such as the iR5000 mentioned previously. It should only need to be installed on the print server itself and not on the desktop client PC's even when printing peer to peer. The desktop driver has a built-in communications tool to address direct communication. The DIAS is just a relay to allow the client to connect to the Canon device through a server.
  Grant Millard  
If you have a Canon IR printer then you'll likely see it. It's called a Driver Information Assist Core Module, and (guessing here) I suspect it wants to see if the printer drivers are up-to-date
apparently it came to my xp computer with canon iR3570 driver installation.
  Jukka K  
Canon printer

Rating chart

Summary: Average user rating of CnxDIAS.exe: based on 10 votes with 7 user comments. 3 users think CnxDIAS.exe is essential for Windows or an installed application. 4 users think it's probably harmless. 2 users think it's neither essential nor dangerous. One user suspects danger.

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Best practices for resolving CnxDIAS issues

A clean and tidy computer is the key requirement for avoiding problems with CnxDIAS. 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 CnxDIAS.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

CnxDIAS.exe [all]