Hi. I have been editing a movie in windows movie maker for a few hours. I have successfully split and cropped the video for many times, but when I have almost finished editing the movie, all the frames disappeared in a sudden. I thought the program was not responding, so I ended the program. It then asked me if I wanted to save the file (in windows movie maker format), so I clicked "save". After that I opened the file again, but the frames were still gone. Then I clicked the "zoom out" button on bottom right corner, and I saw the frames again. But the frames became very small, and what troubled me most was that, I could not edit the frames anymore, including splitting and removing, etc. The preview screen on left hand side went black as well.

So I decided to export the file as movie, even I have not finished editing, better than having nothing. But it remained at "Step 1 of 1: 0% completed", and even I left it for a whole night, it did not proceed at all.

I am using Windows 10. I have tried to set the compatibility mode to windows 8, but it did not work. I have also tried to uninstall and recover windows essentials, but it did not work as well.

What can I do? Why can't I edit my movie? Why can't I export my movie?