Stop Windows 7 From Automatically Adjusting Recording Device Audio Levels

The most annoying thing I have found in Windows by far is when it automatically lowers the volume to the point where someone cannot hear me, just because I coughed or sneezed. It then never raises the volume, causing me to have to manually adjust the volume every couple minutes, which is really annoying. What I am talking about is:

Windows Logo > Control Panel > Hardware and Sound > Manage Audio Devices > Recording > "device" > Levels > Microphone

It constantly lowers the volume and I wish it wouldn't. This happens when I use MSN only. How do I fix it?

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