i have been using movie maker for a few years now, but recently it has been crashing more and more frequently whenever I try to save my final movie.  It hardly even gets to 10% before crashing.  I spent over 2 days making my most recent 30 minute video and now it is providing utterly impossible. i seem to have plenty of memory and all the source files are where they are supposed to be.  I am at my wit's end.  I've looked at compatibility too.  Can you suggest a solution??

Thank you.

Nicola