I made quite the video on Movie Maker. It's a music a video of sorts with cuts of the band playing (both live and the music video) mixed with video of certain things from the Civil Rights movement. It all ends with a bang where the last minute is a cascade of pictures timed perfectly to a constant drum beat during the last minute. I worked for 6+ hours and I was finally satisfied with the timing and ready to save it.

This is where the problem arises. The timing has been thrown off ever so slightly. It seems to have been a tad sped up. The transitions weren't perfect in Movie Maker, but that's what gave it the timing I wanted (I should add I didn't manually insert any transitions. I'm simply referring to the natural transition between clips). The saved file has cleaned the transitions up a bit to the detriment of the timing. I don't want to go back in a manually change the timing, because I'd go mad.

I'm a total amateur at this. Is there a setting that just translates the exact Windows Movie Maker product to a movie file?