To Recover these lost files, I would recommend you use "Recuva" brought to you from the same makers of "Defraggler" & "CCleaner" also known as an whole of "Piriform".
Anyways, I think you should try Recuva, heres the link to download.. http://recuva.com/download/downloading
Once you've clicked the link, wait couple of seconds for the download to begin, but before you use this "Recuva".. I would like to show you couple of screenshots, to see if this is the correct one for you.Edit: Removed copyrighted screenshot images. ~ Animal
Edit: Add link to screenshot images Click Here