Hello... I have a very urgent problem

I have no sound in windowsmovie maker playback. I have tried many solutions.

=========---------------

SOLUTIONS I HAVE TRIED:

Going into services and restarting windows audio

Re installing windows essentials

repairing windows essantials.

=========---------------

I really dont know what to do. The sound is fine after I save the edits but not while in movie maker

The video file is MP4