What is DUC20.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 DUC20.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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DUC20.exe file information

Windows Task Manager with DUC20
DUC20.exe process in Windows Task Manager

The process known as DUC belongs to software DUC by Vitalwerks (

Description: DUC20.exe is not essential for the Windows OS and causes relatively few problems. The DUC20.exe file is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 1,172,992 bytes (95% of all occurrences) or 1,148,416 bytes. 
DUC20.exe is not a Windows system file. The program is not visible. DUC20.exe is able to connect to the Internet, record keyboard and mouse inputs, hide itself and manipulate other programs. Therefore the technical security rating is 43% dangerous; however you should also read the user reviews.

Uninstalling this variant: In the event of any problems with DUC20.exe, you can visit the support page, update to a possibly corrected version or completely remove DUC (Control Panel ⇒ Uninstall a Program).

Recommended: Identify DUC20.exe related errors

External information from Paul Collins:

Important: Some malware camouflages itself as DUC20.exe, particularly when located in the C:\Windows or C:\Windows\System32 folder. Therefore, you should check the DUC20.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

IP posting software
  rschel   (further information)
Automatically updates your dynamic IP address for your dns account at
    (further information)
Dynamic DNS Client
  Chris   (further information)
Great to use websites that have it IP change every now and then
  remoniz   (further information)
Safe : Dynamic Name Server : Chance ur ip into an ! usage = to easaly locate your local webserver or local ftp server !!!
It is a dns updater, used for dynamic ip.
  Thiago Cruz   (further information)
It appears to surf the web by itself without leaving any browser history but my proxy log picks up the activity
  Jeff Deveaux   (further information)
I must leave a computer running to be accessed periodically from other remote sites. It is in an area where there are nio broadband services, erg, a dial-up connection. If the computer reboots for any reason (automatic updates, etc.) a new IP address is assigned making remote access problematic -- that's where No-Ip and DUC20 come into play. The DUC20 reads the new IP address, reports it to the the server which has a redirect for a user-friendly address (, for example). We login to the friendly name and are rerouted to the new IP address. Highly Recommended!.
  Stan Snyder dynamic IP update client.
  Gatts   (further information) dynamic DNS

Rating chart

Summary: Average user rating of DUC20.exe: based on 10 votes with 10 user comments. 8 users think DUC20.exe is essential for Windows or an installed application. One user thinks it's neither essential nor dangerous. One user suspects danger. One user is not sure about it.

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Best practices for resolving DUC20 issues

A clean and tidy computer is the key requirement for avoiding problems with DUC20. 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 DUC20.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

DUC20.exe [all]