I recently upgraded to Windows 10 and Movie Maker 12 from Windows 7 and old Movie Maker. I had no problems with old Movie Maker with Windows 7. With Windows 10/Movie Maker 12, I don't get any video in the editing box when I import one - all I see is a sound wave profile (full screen preview is just black). When I play it, I do get the audio but sometimes (not always) it is accompanied by a loud background static sound. This happens with both MP4 and WMV files.

I uninstalled and reinstalled Movie Maker 12, with similar results.

Thanks for the help.