I don't know whether .avi files are prone to corruption or if there's just something wrong with my computer, but I've having great trouble making them play right. I'm using Windows Media Player (could this be the problem?) and either they don't play at all, and instead an error is displayed reading "Windows Media Player encountered a problem while playing the file. For additional assistance, click Web Help." (the link doesn't help), or a little message appears in the bottom left of the window where the title normally displays if a video is playing correctly saying "Codec required" ... "Acquiring codec"... "Codec acquired", and then it plays the sound but not the image, just swirling visualisations. Can anyone help me figure out what's going on?