After creating a 20 minute movie, and closing movie maker -- upon re-opening the program/project, most of the clips are blank. No video or audio. The source files remain untouched on the disk. The other clips play just fine. The source files play just fine using the built in default metro movie player.

The clips that do not play all have either anti shake or anti shake & wobble applied. The clips with neither of those filters applied seem to play just fine.

OS: 8.1

Movie Maker Ver: 2012 16.4.350.3508.0205

Prepare files for faster editing -- Checked

Prepare files for better stability -- Checked

Clips recorded on Sony HandiCam

   MST file extension

    1440x1080

    29 frames/sec