Windows Explorer Display

I apparently made a change that in W.E. I do not want. When I look at a folder containing jpeg images, the thumbnails are all the same and are a picture of a lake with hills in the background. If I open Paintshop, I can see the images correctly. How can I change the appearance in W.E to display actual thumbnails?

Sorry, I missed this when first posted.

This happens automatically if you choose any of the Windows Explorer options which use small icons.

To the right of the line containing "Organize ... Share with ... Slide Show ... New folder" is a list box icon, select the "more options" carat and you will have a select box. For me, "Small Icons", "List", and "Details" just show the photoshop placeholder icon, the other options show actual thumbnail pictures.