After saving a Movie Maker file as .wmv to computer movie form to disk, I changed the name (same .wmv extension) and then it fails to open due to a corrupt file.  Does the file store the original name inside and not allow you to change it at the Windows Explorer level?  Why?

On a large movie file, if I make a mistake in the name, It is time consuming to have to go back into MM and save it all over again.  What is the solution?

Windows 8.1

Jimmy