http://www.cgsecurity.org/wiki/PhotoRec

Upper RHC - click on the 6.11

You will get a zip file; extract the files and open the folder. Open the win folder, and you will see the program - looks like a big eye. LOL

Back up the hard drive you are searching.

Here is PhotoRec Step by Step: http://www.cgsecurity.org/wiki/PhotoRec_Step_By_Step