I have converted a video file (of a wedding) to an avi file using WinAvi. I then open the avi file with Windows Movie Maker bot a dialogue box pops up saying "The file xxxxx cannot be imported because the codec required to play the file is not installed on your computer. If you have already tried to download and install the codec, close and restart Windows Movie Maker, and then try to import the file again."
I have re-opened WMM several times, but the dialogue box pops up again. Is there anywhere I can download the codec from, if so which codec do I need, and where do I save it to?