Bonjour, also known as zero-configuration networking, enables automatic discovery of computers, devices, and services on IP networks. Bonjour uses industry standard IP protocols to allow devices to automatically discover each other without the need to enter IP addresses or configure DNS servers.
If you’ve installed software by Apple such as iTunes, software by Adobe such as Photoshop Creative Suite, Trillian, Pidgin, etc, chances are there’s already a Bonjour folder in your Program Files. This service starts automatically and runs a process named mDNSResponder.exe which you can usually end quickly in Windows Task Manager, although sometimes you will not be allowed to end the process. If you do not want Bonjour to be present on your computer and want to uninstall it, sometimes you can’t find any uninstaller for it and this is when third party uninstaller software comes into play! Even if you go to Control Panel’s Add or Remove Program, you can’t find the uninstaller there as well.
Here’s how to safely uninstall Bonjour and remove mDNSResponder.exe
Obviously, before going through these steps, it’s best to make sure Bonjour isn’t actually removable via Add/Remove, because very often it is and people just miss it!
If it’s confirmed as not being visible or removable via Add/Remove, just follow the few simple steps below to remove Bonjour from your computer manually.
1. Go to Start -> Run -> type the command below and hit OK.
2. Go to Start -> Run again, type in this next command and hit OK.
regsvr32 /u “%PROGRAMFILES%\Bonjour\mdnsNSP.dll”
3. Restart your computer.
4. Navigate to C:\Program Files
5. Delete the Program Files\Bonjour folder.
The first command will stop and remove Bonjour Service from your computer. To confirm, go to Start -> Run and type services.msc. Look for Bonjour Service name. If it’s not there, you’ve successfully removed it. If you’re unable to remove the Bonjour Service, you can download Turn Off Bonjour to automatically remove the service. The second command will unregister the associated mdnsNSP.dll so the folder can be deleted. If there is an error in trying to unregister the file, you can always renaming the mdnsNSP.dll file to mdnsNSP.old before rebooting.
If there are still erroneous entries left in Add/Remove they might be removable by simply double clicking on them, or alternatively you could use a utility such as CCleaner to “Delete entry” from the Uninstall function.
If you encountered problems after uninstalling or removing Bonjour, you can download and reinstall it using the below link. It should then install properly and be easier to remove again.