Whenever I save a Movie Maker Project as a .wmv/.mp4, only the audio plays and a black screen shows up instead of the videos.

I have Windows 7 and Version 12 of Movie Maker. I used .mov, .jpg, and .png files on my project. I already did some research and tried updating my video driver, but there are no available updates for my device. This is due very soon so any reply is greatly appreciated. Thank you.