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What does the mDNSResponder.exe file do?

The mDNSResponder.exe process is also known as Bonjour Service or, as the case may be, RIM MDNS Service and is a part of Bonjour or, as the case may be, Adobe Version Cue (Version CS3 Client). This software is produced by Apple (www.apple.com) or, as the case may be, Audinate Pty.. An obsolete or defective version of mDNSResponder.exe can cause problems for your computer that can range from slowness to error messages such as these:

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What you should know about mDNSResponder.exe Bonjour service

mDNSResponder.exe is not a Windows system file and is known to frequently cause computer problems. MDNSResponder.exe is found in a subdirectory of "C:\Program Files". Frequently occurring are file sizes such as 229,376 bytes (44% of all these files), 238,888 bytes as well as 21 other variants.
The program executes in the background, and can only be terminated using Windows Task Manager. MDNSResponder.exe is no part of Microsoft Windows. You may uninstall the related program using Windows Control Panel. This process can initiate a network connection--either to the Internet or on your LAN. It has a digital signature. This confirms that the producer has been registered with a certificate authority. The original file is digitally signed. Check your file. For this reason, 32% of all experts consider this file to be a possible threat. The probability that it can cause harm is high.

If you see this file on your hard drive or in Windows Task Manager, please make sure that it is not a malicious variant. It's a fact that many trojans try to cloak their true identity by calling themselves mDNSResponder.exe. With the above information or by using tools like Security Task Manager you can determine if, in your case, the file is an undesirable variant.

What do other computer users say about mDNSResponder?

Used by the Apple Redezvous networking system. Responds to network requests for resources if setup. (further information...)
Nidonocu
Announces local services on the network
Qerub
Unknown application. I do not have any Apple products (incl Quicktime) on this computer.
Sean A. Turvey U.E.
Was not previously installed on my computer until an update to the VOIP app Gizmo was automatically installed, at which point it started requesting access every time the internet connection started. Also concurrent with DNS problems although they may be unrelated.
EK
It was installed on my computer by Apple iTunes v5.0 without my permission. It can be stopped in "Services" and then deleted. MsConfig will allow you to turn it off, listed under services tab.
Jim Boka

Summary: 48 users judge mDNSResponder.exe to be an essential file that should not be touched. 19 users consider it harmless. However, 34 users consider this to be a suspicious process and would like to get rid of it. For this reason, 32 users have already deleted mDNSResponder.exe. source: file.net

How to uninstall Bonjour or Adobe Version Cue

mDNSResponder.exe  Bonjour service fix

To remove Bonjour service from your computer, please follow the manual instructions below or use an automatic uninstaller product.

  1. Click the Windows Start Button. In Windows 8, look for Control Panel.
  2. Click Control Panel.
  3. Click Uninstall a program.
  4. Look for Bonjour or Adobe Version Cue in the list of available programs.
  5. Click Uninstall.

How to tell if mDNSResponder.exe (Bonjour service) was uninstalled cleanly

After uninstalling, restart your computer. Then start Windows Explorer and see if there is still a folder with the name of the software under C:\Program Files. Be sure to check the Registry as well for remnants of Bonjour service. To do this, start "Regedit", then look under "HKEY_LOCAL_MACHINE" > "Software" for Bonjour service or the name of the producer. Always keep in mind that only a computer professional should ever directly delete entries in the Windows Registry.

What to do if a program does not uninstall

The easiest way to remove any kind of software cleanly and accurately is to use an uninstaller tool. Because the uninstaller automatically creates a backup, there is no risk of anything going wrong.

Last but not least

If Windows not working quite right for you, or if startup is taking a long time, or mDNSResponder.exe is causing problems for you, a good Registry Cleaner may very well help. This is especially effective when it comes to older computers that have accumulated vast quantities of "garbage data" as the result of many software installs and uninstalls.

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