I don't have an answer but this might serve to get you more attention.
What program did they open in? Is this program still available, working correctly, associated with the correct file types?
What happens when you click on an image now?
What do you mean you "put them on the desktop" and you "stored them in my documents"? simply that you keep them in My Documents, which you access from the desktop?
More information will probably get you an answer.
Best of luck.