mdnsresponder.exe is a application which is probably legit. So, if mdnsresponder.exe is on your PC, it is probably ok, and will NOT be a cause for concern. Even if your PC is virus-free, it is still recommended to purchase a well-known antivirus with a good detection rate, in order to defend yourself against potential security problems.
Usually, this program is found in C:\Program Files\Bonjour\mDNSResponder.exe.
The MD5 fingerprint for this executable is db5bea73edaf19ac68b2c0fad0f92b1a.
This program is set up as a Windows service. This means it runs on your PC in background, usually without displaying any user interface to you. Most Windows services are legit programs, which provide useful functions to other applications or to Windows in general.
This app runs in 32-bit mode. It does not benefit of the full set of features of nowadays' computer processors. This ordinarily happens because the publishers did not upgrade it to 64-bit code.
The description present in the exe is Bonjour Service.
File version 3,0,0,10.
Author Apple Inc..
Legal copyright notice Copyright (C) 2003-2011 Apple Inc..
Some dangerous features of the Operating System appear to be used, such as functions for tapping the keyboard. We advise you to be very careful regarding this program.
mdnsresponder.exe is digitally signed. Today most virus-free programs are digitally signed.
The digital signature found in mdnsresponder.exe is valid. This is most likely a clean, ok program.
Digitally signed by: Apple Inc.
Certificate's issuer name: VeriSign Class 3 Code Signing 2010 CA
It has an uninstall string in registry, which is good. si are uninstall.