Random pictures blurry and music skips/doesn’t continue

Hi all -

I have a presentation tomorrow night, and am having some problems with my Windows Movie Maker.  When I play the presentation, random photos will be blurry (different ones each time, and are not blurry otherwise).   Also, the music will skip in the middle of a song, and when one song ends, it will not automatically continue to the next one I have on the presentation.  Please help!  Thank you!