Try a data recovery software! Easy recovery etc. search in the forum and you will get some pretty good names of such softwares.
Try Recuva, Its free and easy to use but again there is a very less chance of getting the bigger files recovered (i.e Movies, Songs etc). Best of Luck.
Yes, even I would prefer Recuva. It is the most efficient software in this trade. But try comsidering other options available, like File Scavenger, Advanced Uninstaller Pro. , Tune Up Utilities 2010.