Movie Maker Not Saving To Computer?

I have recently been having problems with my version of moviemaker, Its the latest one for my computer, I'm on windows 7 so I have that version of movie maker. The problem is that I make my movies just fine, I mainly use gifs and just the movie maker text slides inserted inbetween and of course a bit of audio to finish it all off. I've always done this and never experienced a problem before but lately I have been trying to save my projects onto my computer to upload to other things and they just won't save, I click save project onto computer and it just freezes up on me and tells me its not responding and it stays that way so that I'm left with the problem of not being able to save to my computer. Help please?