When a file is deleted from your computer, its contents aren't immediately destroyed. Windows simply marks the hard drive space as being available for use by changing one character in the file table. If you manage to start an undelete process
before Windows overwrites that part of hard disk with new files. You can set that flag back to "on" and get your file.
As I know, you can download some free recovery software as follow to recover deleted files.
Note：Stop using the current disk as main disk, please keep it unchangeable before recovering the files.
Pandora Recovery actually recovers files permanently removed from Recycle Bin, files originally deleted using Shift + Delete keys bypassing Recycle Bin and files deleted from DOS prompt. Pandora Recovery allows you to find and recover recoverable
deleted files from NTFS-formatted volumes, regardless of their type - you can recover pictures, songs, movies or documents. Setup file is 2.12 MB in size. For more information, please visit the following link.
DataRecovery is freeware and written by TOKIWA to undelete accidentally deleted files even from recycle bin. It supports FAT12, FAT16, FAT32 and NTFS undeletion. Even in both NTFS compressed files and EFS encrypted files. Zip file is only 198
KB in size, no installation required and it’s portable.
Undelete Plus is a quick and effective way to restore accidentally deleted files. It can also recover files that have been emptied from the Recycle Bin, permanantly deleted files within Windows using the Shift + Delete, and files that have
been deleted from within a Command Prompt. Undelete Plus works under Win 95/98/Me/NT/2000/XP/2003/Vista operating systems. The program supports all Windows file systems for hard and floppy drives including FAT12/16/32,NTFS/NTFS5 and image recovery from CompactFlash,
SmartMedia, MultiMedia and Secure Digital cards. Program is only 583 KB in size and requires no installation. Portable. For more information, please visit the following web site.