Try setting your folder view to details and see what is the file type listed for your digital images.
If it is not listed a jpeg then make a copy of one of the file and try and rename with the jpeg file type and see if it'll now open in Windows picture and fax viewer.
For some reason my pictures won't open. When I look at the properties under file type it says file. There is no program associated with the type and I have to manually pick one. I am using Windows picture and fax viewer. It will not let me select it as the program to always use. I would like to view my pictures but I don't know how. Can anyone help me? Any input would be greatly appreciated.

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