Windows movie maker

- For some reason out of no where, in the middle of editing a video, my windows movie maker looked like it just loaded for some reason mid-editing.

- Shen it loaded i couldnt see the video screen, but i could still edit the video.

- So i decided to save and close the client and open the video i was editing

- When i started editing, i cut out a certain amount of my video with "split" 

- Now randomly it instantly takes out everything after the where i did the split.

any suggestions?? im thinking its a glitch..

(clearer) - 20 minutes in the video and im in 8 minutes of editing i press split at 9 minutes and the rest of the 11 minutes disapeared.

should i redownload windows movie maker??

if i delete windows movie maker will my video be gone???