When you delete files from Windows 7, they are not really gone. The files are simply moved to the Recycle Bin, where they can be restored to their previous location. The files are not truly deleted until you empty the Recycle Bin. However, if you did not mean to delete a file, you can access it from the Recycle Bin and restore it.
Double-click the Recycle Bin on your desktop to open it in a separate window.
Right-click any file you wish to undelete and choose "Restore." The files are then restored to the same location from where they were deleted.
Undelete more than one file by holding the "Ctrl" key and clicking multiple files from the Recycle Bin to select them, then click "Restore"