What is vncviewer.exe?

The genuine vncviewer.exe file is a software component of VNCViewer by RealVNC.
RealVNC is a software development firm founded by Andy Harter in 2002. It offers remote access software. VNC Viewer allows you remote access to your computer from anywhere. For example, it allows you to monitor activity on your computer from a mobile phone. This is not an essential process. But this file is crucial to the running of VNC Viewer.

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 vncviewer.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.

Click to Run a Free Scan for vncviewer.exe related errors

Vncviewer.exe file information

Windows Task Manager with vncviewer
Vncviewer.exe process in Windows Task Manager

The process known as VNC® Viewer or RSS Server

belongs to software UltraVNC VNCViewer or VNC Viewer or Bozteck VENM Remote Desktop Manager or Remote Support System or TightVNC Win32 Viewer

by UltraVNC ( or TightVNC Group or R.D.H. LLC ( or RealVNC (

Description: Vncviewer.exe is not essential for the Windows OS and causes relatively few problems. Vncviewer.exe is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 749,568 bytes (28% of all occurrences), 271,696 bytes and 4 more variants. 
It is not a Windows core file. The application can be uninstalled in the Control Panel. The process uses ports to connect to or from a LAN or the Internet. The program has a visible window. Vncviewer.exe is able to record keyboard and mouse inputs and connect to the Internet. Therefore the technical security rating is 13% dangerous; however you should also read the user reviews.

Uninstalling this variant: The software vendor offers the option to uninstall the software Remote Support System or UltraVNC using the Uninstall a Program function of Windows Control Panel (Windows: Start, Settings, Control Panel, Uninstall a Program).

Recommended: Identify vncviewer.exe related errors

If vncviewer.exe is located in C:\, the security rating is 60% dangerous. The file size is 1,024,000 bytes. The program is not visible. The application uses ports to connect to or from a LAN or the Internet. The file is not a Windows system file. Vncviewer.exe is able to record keyboard and mouse inputs.

If vncviewer.exe is located in a subfolder of the user's profile folder, the security rating is 22% dangerous. The file size is 380,928 bytes. The program has a visible window. The application listens for or sends data on open ports to a LAN or the Internet. The file is not a Windows system file.

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

tool zum betrachten entfernter ("remote") desktops, gibts hauptsächlich in der linux-welt, ist aber auch auf windows verbreitet.
  F.   (further information)
vncviewer.exe is a process belonging to the TWD Industries remote administration tool. This process allows other users to control your PC via a local network or the Internet.

Rating chart

Summary: Average user rating of vncviewer.exe: based on 7 votes with 2 user comments. 5 users think vncviewer.exe is essential for Windows or an installed application. One user thinks it's probably harmless. One user suspects danger.

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Best practices for resolving vncviewer issues

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

vncviewer.exe [all]