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Welcome to the PC Pitstop Process Library. We maintain an extensive list of common processes running on today’s PCs. Within this library you can learn more about the processes running on your machine.

Process Library Detail

What is mdnsresponder.exe? Bonjour Service?

Vendor:      Apple
Product:     Bonjour
Vendor Website:      http://developer.apple.com/networking/bonjour/
Last Seen by PC Pitstop:      No Data

Process is Bad PC Pitstop has analyzed this process and determined that there is a high likelihood that it is bad.
Process is questionablePC Pitstop has analyzed this process and determined that the safety of this process is questionable.
Process is goodPC Pitstop has analyzed this process and determined that there is a high likelihood that it is good.
Process is goodThis process is a Microsoft or Windows process, but many viruses use this file name to escape notice.

Purpose: mDNSResponder.exe is a file used by the Apple Bonjour Networking service. According to Apple:
"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. "

Gizmo Project (http://www.gizmoproject.com) adds Bonjour Service to the Windows XP (or Windows 2000, or Windows NT) Services folder.
This service starts automatically and runs a process named mDNSResponder.exe which cannot be ended by Windows Task Manager.
To remove, it must first be disabled in Services. mDNSResponder.exe is essentially the "driver" for this networking service.

Apple is the developer of the Bonjour Networking.
SIPphone, Inc. [www.sipphone.com] is the developer of the Gizmo Project software and service.

Bonjour allows applications like iTunes and Safari to advertise and discover services on the local network. Having Bonjour running enables you to connect to hardware devices like Apple TV and software services like iTunes sharing and AirTunes. If you disable Bonjour, any network service that explicitly depends on it will fail to start.

mdnsresponder.exe uses excessive system and memory resources with no corresponding benefit. Applications such as these should be disabled to improve overall system performance.


mdnsresponder.exe is known to be a bad process. Learn more about protecting your PC from these bad processes with PC Matic.
mdnsresponder.exe could be a harmful process. Learn more about protecging your PC from these potential harmful processes with PC Matic.
This information brought to you by PC Matic. PC Matic's real-time protection, Super Shield, blocks ALL bad and unknown threats to keep your PC secure.
mdnsresponder.exe is a Microsoft or Windows process but some versions of this exe carry viruses.
Learn more about protecting yourself from bad versions of this file with PC Matic.

Percentage of recently scanned PC's with this process running: 5.05%
Average CPU use for this program: 0%
Average RAM for this program: 3 MB


Program Name MD5 Count
mdnsresponder.exe

MD5 Hashes

# Status MD5 Revision Name Size
1 Status 0x1c87705ccb2f60172b0fc86b5d82f00d 4/28/2018 2:15:00 AM Unknown Unknown Bonjour Service 378 KB
2 Status 0xa065f048e9e23e6c026a7bb548d126a7 4/5/2018 12:42:00 AM Unknown Unknown Bonjour Service 337 KB
3 Status 0xf2060a34c8a75bc24a9222eb4f8c07bd 8/2/2016 9:33:00 AM Unknown Unknown Bonjour Service 341 KB
4 Status 0xcc4e72a0fa7f62175c8bb42ba2caa3d5 4/2/2016 2:03:00 AM Unknown 1,0,2,9 Bonjour Networking 224 KB
5 Status 0x9efe4236f8670846b6e7c5b0eff6e715 7/2/2015 2:05:00 PM Unknown Unknown Bonjour Service 233 KB
6 Status 0xe2f35cb96ea14dc7dd6eab24bff187c2 10/11/2014 7:04:00 PM Unknown 1,0,1,2 Bonjour Networking 212 KB
7 Status 0x3b733ddc6c5cef34493b147d76820f6d 8/15/2014 2:29:00 PM Unknown Unknown Bonjour Service 519 KB
8 Status 0x090d09586d752d4dbdda2ca439f91425 8/13/2014 11:33:00 PM Unknown Unknown Bonjour Service 381 KB
9 Status 0xd99f80523d4f4739de72a9d47a8a5bf4 11/15/2013 1:40:00 PM Unknown Unknown Bonjour Service 915 KB
10 Status 0x81371dfe9badc3143dd79198004a351d 8/6/2013 12:48:00 PM Unknown Unknown Bonjour Service 329 KB
11 Status 0x7ff5e81c91962e79216788b313e5e22b 6/17/2013 9:12:00 AM Unknown Unknown Bonjour Service 226 KB
12 Status 0x3cb1d422009df709c5693d40699fb03e 3/4/2013 5:35:00 PM Unknown Unknown Bonjour Service 567 KB
13 Status 0x5c586b136dd1accfe86e71f20dac7c77 10/8/2012 8:13:00 PM Unknown Unknown Bonjour Service 341 KB
14 Status 0xc7d6dc684e722d041fcd84acc4faacb1 8/8/2012 4:41:00 PM Unknown Unknown Bonjour Service 349 KB
15 Status 0x69591590a904374ee99c96c786696c3c 7/2/2012 1:01:00 PM Unknown Unknown Bonjour Service 337 KB
16 Status 0x3bfff53fe4930565a3c898c338f9a145 5/29/2012 9:19:00 PM Unknown Unknown Bonjour Service 232 KB
17 Status 0x10037c3c4739f233ba0974947e6a804f 3/10/2012 4:54:00 AM Unknown Unknown Bonjour Service 233 KB
18 Status 0x8aa1e87be6c3af20c10ad69faf5368e6 11/9/2011 12:12:00 PM Unknown Unknown Bonjour Service 226 KB
19 Status 0x8d03fa76f2a6970f6f3aea3cfbb17358 10/23/2011 4:18:00 PM Unknown Unknown Bonjour Service 337 KB
20 Status 0x86223be36535575d7bc713ca2ee5c711 10/17/2011 2:53:00 PM Unknown Unknown Bonjour Service 337 KB
21 Status 0x87df66c3bb4ad3061b58b8fbcdcd55b6 10/7/2011 2:38:00 PM Unknown Unknown Bonjour Service 381 KB
22 Status 0xd0a3d6d0d183fc99a5e33a295a415de1 9/4/2011 5:33:00 PM Unknown Unknown Bonjour Service 240 KB
23 Status 0x584ae284fcdc28020a8f1c67ab7a416c 8/30/2011 4:58:00 PM Unknown Unknown Bonjour Service 228 KB
24 Status 0x7af4cbc61bc11dbbddb5a9470daaec21 8/16/2011 5:11:00 AM Unknown Unknown Bonjour Service 341 KB
25 Status 0x1bd3d8ea5bd3a1bb318cd8b1db2c4fa6 7/30/2011 8:47:00 AM Unknown Unknown Bonjour Service 439 KB


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