What is mdnsresponder.exe and Should I Remove it?

Well, this discussion is a part of a series in which we will discuss files and services that may raise a question of legitimacy in your minds. Today we are going to discuss the mDNSResponder.exe/Bonjour service process. If you guys have seen it in the Task Manager and had a question about it. That What is mDNSResponder.exe? Why is it running on my PC? The post will answer that. Let’s talk about What is mdnsresponder.exe and Should I Remove it?

What is mDNSResponder.exe or Bonjour?

The mDNSResponder.exe process basically belongs to the Bonjour for Windows service, that is Apple’s “Zero Configuration Networking” application, it is typically installed automatically by iTunes. If you guys have ever thought how one iTunes install can talk to another on the same local network. Then Bonjour is what actually does this behind the scenes actually.

You don’t use iTunes? Well, you are not alone, and that’s not the only way that Bonjour gets installed on your PC. It’s also bundled in the entire bunch of other software, such as Pidgin, Skype, and Safari. And used to connect clients together on the same network as well.

It is basically implemented as a Windows Service, that you can see if you go into the services panel. (Or you just have to type services.msc into the start menu search box). You can also stop it from here anytime as well.

The entire problem we have is that it generally does not show up in Add or Remove Programs. So that you can’t get rid of it via any normal methods. Thankfully you guys can still delete mDNSResponder.exe if you really want to. And it will simply limit some of the functionality in the apps that might depend on it.

Note: Do not remove Bonjour if you use iTunes to share libraries or any other feature from an application that depends on it.

How mDNSResponder install on my computer?

Well, 99% of the time a user will receive Bonjour from an iTunes installation actually.  Whenever you install iTunes, Apple does not give you the option to Opt-out of installing Bonjour.  There are also other applications that make use of and also install Bonjour, However, iTunes is the biggest fish of them all.  Furthermore, to say, iTunes only uses it to share media between computers. A few other programs that needlessly install Bonjour are Skype, Photoshop CS3, and Pidgin, although none of them need it to function actually.

If you guys do not use iTunes to share libraries between computers, then let’s get rid of it right now!

mdnsresponder.exe

How To turn off And Remove mDNSResponder.exe aka Bonjour

As said above, iTunes media sharing and some other programs use Bonjour for their networking services.  Hence removing the Bonjour service will avoid network activity within those applications. However, if you do not use them anyway let’s just get rid of this then useless process as well.

There are basically three methods in order to stop mDNSResponder.exe; completely uninstalling it, disabling it, or deleting it through the cmd prompt.

Uninstall Bonjour

From the Start Menu, you need to open up the Control Panel.  When you reach there, choose to Uninstall a program.

Now just scroll down and choose Bonjour, then tap on Uninstall.  Complete the next few prompts and you are all done!

Turn off the service

Tap on the Start Menu and Type services.msc into the search box, and then tap Enter.

Now scroll down the list of services, Right-tap on Bonjour Service and choose Properties.*

*On some of the computers the service will be known as:
##Id_String2.6844F930_1628_4223_B5CC_5BB94B879762## instead of Bonjour.

In the properties window General tab, you have to set the Startup type to DisabledTap on OK in order to save changes and finish. You can now restart your computer and then mDNSResponder.exe will not be running on your computer.

Remove Bonjour through the cmd prompt

If you’re absolutely sure that you want to delete it, then it’s really pretty simple. First, open up a command prompt in administrator mode then (right-tap and select Run as Administrator), and then change into the installation directory, mostly the following:

\Program Files\Bonjour

If you guys are using Vista or Windows 7 x64 edition, then you will need to go into the Program Files (x86) folder instead. Now that you guys are there, you have to type in the following command to view the options:

mDNSResponder.exe /?

So now we know what to do to delete it! Simply you have to type in the following:

mDNSResponder.exe –remove

You will then get a message that will say that the service has been removed. (Note again that you need an Administrator mode command prompt actually)

mdnsresponder.exe

You will want to also turn off the DLL file in the directory through renaming it to something else:

ren mdnsNSP.dll mdnsNSP.blah

You should be able to actually delete that whole directory if you really want to.

How can I Enable It Again?

Well, so your favorite application broke? No matter, you can easily re-install the Bonjour service along with the following command:

mDNSResponder.exe -install

Is the mDNSResponder.exe process necessary?

The process is basically associated along with an Apple service and is not a part of the operating system itself. Hence, it is not important that it keeps running in the background. But, iTunes or other Apple associated programs basically need it. If you connect Apple devices along with your computer or use share iTunes library, then the program is important for you. This process does not need a lot of system resources and would not bother your work.

mdnsresponder.exe

If you want to turn off the Bonjour process then use the following method.

  • To start, tap Win + R to open the Run window and then type the command services.msc.
  • tap Enter in order to open the Service Manager window. Then locate the Bonjour Service.
  • Right-tap on it and then choose Properties.
  • Then change the Startup Type to Disabled.

You can also consider removing the Bonjour application from the Programs and Features window to prevent such problems.

Is mDNSResponder.exe/Bonjour a virus?

Well, a virus can have any name in a system. If you want to verify whether a process is a virus or not, we mostly check its path from the Task Manager. But, in the case of Bonjour, it is a regular program file in the Programs folder actually. We cannot differentiate it be merely checking the location as well. This process is located at – %PROGRAMFILES%\Bonjour\ folder.

Check its File Properties and if you feel, then run a reputable anti-virus program on the system.

Conclusion

You are good to go. If you have any queries and issues related to this article then let us know in the comments section below.

Also See: How To Fix Battery Not Charging Issues On Windows 10

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