As mentioned before, WMM will import AVI files, so for the best quality, you'll want to convert your video to AVI. As also previously mentioned, the quicktime to AVI codecs will give you terrible quality video. What I do is import the file into Adobe Premiere Elements 11 (other versions may work, but make sure it will import .mov files) on a Windows machine. Then simply share the video as an AVI. APE 11 is pretty fast so I'm assuming little or no re encoding is going on and the final AVI video looks great.