I have tried everything and it keeps saying this: "Windows Movie Maker cannot save the movie to the specified location. Verify that the original source files used in your movie are still available, that the saving location is still available, and that there is enough free disk space available, and then try again." 

I tried saving it in multiple different folders but it didn't change. I've checked every piece of video I have used and nothing is missing or in the wrong place. And there is definitely enough disk space because I have 7gb left of space and the video is 21mb. I've saved videos before now with no problems but this time it just wont save.

I would appreciate any help or advice because I need this video to save for a project I am doing. 

Thanks in advance. :)