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. Depending on how many sectors that file occupies, pieces of the file could exist on your drive for a very long time. If you very recently deleted the file, there's an excellent chance you will recover it, especially if you haven't downloaded a bunch of new files or created several gigabytes of data. The trick is finding the right tool to get them back.

You can try to recover you files using Pc Inspector File Recovery software.
PC INSPECTOR™ File Recovery 4.x is a data recovery program that supports the FAT 12/16/32 and NTFS file systems.

You can download it free from here.