What is nimdnsResponder.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 nimdnsResponder.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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NimdnsResponder.exe file information

Windows Task Manager with nimdnsResponder
NimdnsResponder.exe process in Windows Task Manager

The process known as National Instruments Zeroconf Service belongs to software National Instruments mDNS Responder Service or NI_ZEROCONF_SERVICE or NI_MDNSRESPONDER3_SERVICE by National Instruments (

Description: NimdnsResponder.exe is not essential for the Windows OS and causes relatively few problems. NimdnsResponder.exe is located in a subfolder of "C:\Program Files (x86)"—typically C:\Program Files (x86)\National Instruments\Shared\mDNS Responder\. Known file sizes on Windows 10/8/7/XP are 260,976 bytes (60% of all occurrences), 320,368 bytes or 194,224 bytes. 
You can uninstall this program in the Control Panel. The program is not visible. The file is a Verisign signed file. The file has a digital signature. The software listens for or sends data on open ports to a LAN or the Internet. The file is not a Windows system file. Therefore the technical security rating is 24% dangerous.

Recommended: Identify nimdnsResponder.exe related errors

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


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Best practices for resolving nimdnsResponder issues

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

nimdnsResponder.exe [all]