It would help if we knew why you can't view them.
Do you open the files in a picture viewer and see nothing? Does the system refuse to let you open the files due to protection? Or do you double-click on the files and the system either doesn't know what to open them with or opens them in the wrong application?
Another thing that you might try is opening the directory in Windows Explorer and changing the view mode to Thumbnails, to see if the files actually contain pictures. Good luck, and please provide more information.