Movie Maker crashes when attempting to use .MTS files from Canon Camera

I'm hoping someone can help here, because countless searches have led to just dead ends thus far. I recently rebuilt my PC with a fresh Win 7 (32bit) install. I've used Windows Live Movie Maker a ton in the past and never had any issue editing .MTS files from my Canon HD video camera. After the fresh win 7 install, I immediately downloaded movie maker and wanted to start editing some videos. The first time I attempted to load a .MTS file, Movie Maker immediately crashed and displayed the error "Movie Maker Transcoder has stopped working", followed by "A problem caused the program to stop working correctly. Windows will close the program and notify you if a solution is available."