Hi i recently made a movie with windows movie maker and saved it as a wmv. Somehow i wasn't paying attention and deleted the file. How can i recover it?

Is it in the Recycle Bin?

If not, you can try a file recovery program. Do a Google (or search engine of your choice) search for "deleted file recovery" and you should get lots of hits. Most will probably be Trial programs, however there are a few free ones out there.

NOTE: The more you use the system/drive, the less likely a (full) file recovery will occur.