The nac.dll file is part of an Internet Audio Network Access Control (NAC) module for Windows NetMeeting from the Microsoft Corporation.  Windows NetMeeting was a peer-to-peer messaging client included in many versions of Windows (up to XP).  It allowed for videoconferencing and VoIP communications.

Network Access Control is a security measure that protects your system from unwanted intrusions by using authentication at the system level.  A problem with this file may disable your ability to use Windows NetMeeting.  You should try cleaning your registry to fix this issue.

The registry is an information desk for Windows that tracks all the files you have installed on your computer.  Mistakes in registry entries lead to dll file errors.  ZookaWare PC Cleaner is on the case for you.  ZookaWare PC Cleaner hunts down and fixes registry mistakes, getting your system back in gear.  Blast away those dll errors with ZookaWare PC Cleaner!  Find out now if your registry needs by be cleaned by running a free, no strings attached, ZookaWare PC Cleaner scan.

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