Windows marks files for deletion and removes them from the file system database when you delete them. This doesn't mean they are immediately gone. In fact, all that initially happens when you delete a file is Windows makes note that the space occupied by the file is listed as available space for storing new information. Until something new is written to the part of the drive where that old file was stored, your file is still there.   Data Recovery FAQ

NT File Recovery is a quick and effective solution to restore accidentally deleted files from NTFS file system.
The software supports recovering all types of files like documents, applications, media files etc.

No skills needed, 100% FREE!

See also U3 File recovery