Check out PC Inspector File Recovery, should be free, not as good as the big guys but works pretty well.
DO NOT DOWNLOAD IT FROM YOUR COMPUTER. I give 60% chances the file is still there, people don't understand how easily files are lost, how hard drive space is written over constantly, stop using your computer and use another computer, even a public one, to download it. Install it on a CD or flash drive, then run it on your computer.
Wisemen are hard to find, they are tarnished by sayings and quotes that are not of their true nature.