What is cnab4rpk.exe?

The genuine cnab4rpk.exe file is a software component of Canon Advanced Printing Technology by Canon.
A Remote Procedure Call application from Canon, this process starts with Windows and utilizes RPC features from Windows to interact with your Canon printer more efficiently. As soon as it detects a print command, it facilitates communication between the OS and the driver. Founded in 1937, Canon Inc. is a Japanese corporation that has transitioned from a company that focuses on traditional film and development to a digital leader in camera and video development.

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 cnab4rpk.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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Cnab4rpk.exe file information

Windows Task Manager with cnab4rpk
Cnab4rpk.exe process in Windows Task Manager

The process known as Canon Advanced Printing Technology RPC Server Process belongs to software Canon Advanced Printing Technology by CANON INC (

Description: Cnab4rpk.exe is not essential for the Windows OS and causes relatively few problems. Cnab4rpk.exe is located in the C:\Windows\System32 folder. Known file sizes on Windows 10/8/7/XP are 57,344 bytes (43% of all occurrences), 63,112 bytes, 113,856 bytes or 62,848 bytes. 
The program has no visible window. It is not a Windows system file. The software uses ports to connect to or from a LAN or the Internet. The cnab4rpk.exe file is a Verisign signed file. Therefore the technical security rating is 29% dangerous, however you should also read the user reviews.

Recommended: Identify cnab4rpk.exe related errors

Important: Some malware disguises itself as cnab4rpk.exe, particularly when not located in the C:\Windows\System32 folder. Therefore, you should check the cnab4rpk.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

Canon Advanced Printing Technology RPC Server Process
it is dangerous

Summary: Average user rating of cnab4rpk.exe: based on 3 votes with 2 user comments. 2 users think cnab4rpk.exe is essential for Windows or an installed application. One user thinks it's neither essential nor dangerous.

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Best practices for resolving cnab4rpk issues

A clean and tidy computer is the key requirement for avoiding problems with cnab4rpk. 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 cnab4rpk.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

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