I just reformatted my harddrive with my old Windows 7 Professional disk. Then I downloaded Audacity again. I had an old .wav file that I wanted to convert into Audacity and when I did the Audacity opened with a huge hole in it and the statement “Audacity Is Not Responding”. I didn’t wait around for it to open. I was able to do what I wanted with the .wav file. Anyone else had this problem? 
Then I downloaded Audacity again
From here?
http://www.audacityteam.org/download/windows/
I had an old .wav file that I wanted to convert into Audacity
Audacity will open WAV files natively, you don’t have to convert anything. Did you File > Import the work?
I was able to do what I wanted with the .wav file.
By doing what?
How do you know it was a WAV file? Do you have Windows set to show you filename extensions?
Was the sound file right on the WAV bit barrier? 2GB or 4GB?
Koz