What is cdnup.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 cdnup.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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Cdnup.exe file information

The process known as cdnup or LiveUpdate Module belongs to software Chinese Navigation or CNNIC cdnup or CdnUpdate Module or LiveUpdate Module by CNNIC (

Description: Cdnup.exe is not essential for Windows and will often cause problems. Cdnup.exe is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 201,152 bytes (9% of all occurrences), 319,488 bytes and 18 more variants. 
Cdnup.exe is not a Windows system file. The program is loaded during the Windows boot process (see Registry key: MACHINE\Run). The program is not visible. The cdnup.exe file is a file with no information about its developer. It can change the behavior of other programs or manipulate other programs. Cdnup.exe is able to monitor applications and manipulate other programs. Therefore the technical security rating is 65% dangerous; however you should also read the user reviews.

Uninstalling this variant: You could uninstall Chinese Navigation from your computer using the Control Panel applet Uninstall a Program.

Recommended: Identify cdnup.exe related errors

Important: Some malware camouflages itself as cdnup.exe. Therefore, you should check the cdnup.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

Has been associated with Chinese Keyword spyware browser helper object - is restricted for access to terminate program by windows
  Ben D  
cdnup is an invisible ad-blocker. it will launch internet explorer and visit some chinese website when u startup

Summary: Average user rating of cdnup.exe: based on 4 votes with 2 user comments. 4 users think cdnup.exe is dangerous and recommend removing it. One user is not sure about it.

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Best practices for resolving cdnup issues

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

cdnup.exe [all]