“Backup the clips, not just the project file!”
I’ve been screwing up.
I’ve taught basic workshops on Windows Movie Maker for years now, usually early in the semester. 
When they work on their assigned projects weeks later, too many students don’t correctly back up their unfinished video projects. They think the Project.MSWMM file is all they need, and don’t back up the video clips that go with that project. So, when they try to finish on another machine, either at home or on another PC in the labs, they see the big red X’s instead of their video clips. Result? FAIL. Must figure out how to make this clearer, but for now, find the steps after the jump.