I use a Sony Handycam HD camcorder to shoot family videos.  Windows Live Movie Maker to edit them on a Windows 7 ASUS laptop... 

When I view the file prior to import, the video plays fine.  When I view the footage in Movie Maker everything looks fine.  When I publish the file (tried a number of different formats) it messes the footage up.  Hard to describe, but picture what your HD signal TV looks like when it's struggling with reception.

I tried the YouTube video editor on the same files and everything works fine.  So I've decided it has to be in the export / publish stage of WMM....  Appreciate any and all help I can get.  Happy to share additional information if needed.