Movie Maker 2 is a great entry level moving making program for the PC -- and MovieMaker comes FREE with your PC. (I highly recommending updating Movie Maker before embarking on a project!) I love atomic Learning, and this should be a great tutorial.
Every few weeks through October, a new podcast episode from Baz and his production team will introduce you to another aspect of moviemaking, starting with on-set still photography, then moving on to costume design, cinematography, scoring, and more. You'll get insights from the artists at work on Australia, watch them in action, view footage the rest of the world hasn't seen yet, and follow along as the movie comes together.
The free movie program for Windows is Windows Movie Maker. This is a link to the version for Windows 7 and 8. It doesn't come loaded but you can install it for free.