I made a movie in Movie Maker file on Windows 8.1 computer.  I had photos and music added.  I had saved the project in my Windows Picture file many times and was ready to prepare the file for DVD.  I got a message saying file prep is enabled in Options OX887A0005.    I tried to go back to my movie after this and it is gone from the file.  It is not in the picture file although the name is there and it looks like it is there but there is zero pictures and music added.  Is there any way to recover this?  It was about an hour and 45 minutes long.  Is this too long for this type of project?  Thanks