I believe that WIndows Movie Maker compresses the final movie to windows media format, which makes things look fuzzy at low settings. Check the file extention of your resulting combined movie after you save it. Does it end with .wmv? If so, that's the reason. You might be able to adjust the quality settings in the Movie Maker, but I'm not familiar with it. For combining clips, editing, and FX, I use Vegas Video 4.0 by SonicFoundry. It allows you do a lot more, and save your final cuts as many different file formats with multiple resolution and playback settings.