So you have accidentally deleted a file from your computer and you would like to get it back.

Then try Recuva , software from  Piriform.

Recuva will scan your system and attempt to recover the file that you have deleted from your Windows computer , MP3 , recycle bin , didgital camera card.

Best of all it's free.

Here is a review of Recuva from Tekzilla

http://revision3.com/player-v6255