“Movie Maker has stopped working” error when “Save movie for Computer” to convert wlmp file to mp4 or wmv

Hello, I have used movie maker for couple of years but as of couple of months ago started having problems. I create a new project with photos and music. I save project which is saved as .wlmp.  Then I do file, save movie for computer (or burn a DVD), I get the famous window "Movie maker has stopped working".  Check for on line solutions or close program.  Observation: projects with only pictures have no issues (I get the mp4 file created).  But when I add music to my photos, the error pops up.  It doesn't matter which music file I use.  I have windows 7, I have uninstalled and reinstalled movie maker couple of times. I have also done virus check. I have spent hours on this.  Can you help.