"Do you want to remove 'javaw 2017-12-16 15-16-52-720.avi' from the project?

The file might be corrupted or in a format that Movie Maker doesn't recognize.

This movie can't be saved or published until javaw 2017-12-16 15-16-52-720.avi is removed from the project.

Error: 0x80004003"

Everything was working fine, until I closed the project to start another one, which I then canceled, and when I went back to this one, it was corrupted.