You could also try
Recuva
It's another free file recovery program.
For info about how to use Recuva, check out this forum:
Piriform Forums -> Recuva Discussion
In particular, see the top 2 pinned threads... 'How to use Recuva' & 'Beginner's Guide'
If you need to recover deleted files, use your computer as little as possible before attempting recovery. Data Recovery Facts and Information