mdnsresponder.exe is a program which is most likely NOT a virus. So, if mdnsresponder.exe is on your PC, it is most likely ok, and will NOT be a cause for concern. Even if your system is clean, we still advise you to purchase a good antivirus with a good track record, in order to defend your system against threats.
Usually, this application is found in C:\Program Files\Bonjour\mDNSResponder.exe.
The MD5 checksum for this file is db5bea73edaf19ac68b2c0fad0f92b1a.
This program is a Windows service. This means it runs on your PC in background, usually without showing anything to you. Most Windows services are ok programs, which provide useful features to other applications or to the Windows Operating System.
This application runs as a 32-bit program. It does not use the full set of features of current PC chips. This is quite normal because the authors did not bother to upgrade it to use the x64 instruction set.
The description present in the exe is Bonjour Service.
File version 3,0,0,10.
Company name Apple Inc..
Legal copyright Copyright (C) 2003-2011 Apple Inc..
Some unusual functions of Windows appear to be used, such as functions for recording the keyboard. We recommend you to perform more in-depth research about this program.
mdnsresponder.exe has a digital signature. Today most legit programs are digitally signed.
The digital signature extracted from mdnsresponder.exe is valid. This is most likely a clean, ok program.
Digital certificate name: Apple Inc.
Certificate's issuer name: VeriSign Class 3 Code Signing 2010 CA
It has an uninstall routine, which is good. si are uninstall.