Have you tried opening these files in different programs. for example can you open it in internet explorer or firefox. or can you edit the photos by using something such as paint or photoshop?
you can do this by right clicking on the image you want to open and then click open with and then choose the appropriate program.
Can you show the exact error message? If you take that exact error message and put it into google, chances are you're not the first who has gotten that message
some one else might have posted something some where.
I have just been aeay for the weekend and a friend of the wifes said try to open the picaso which i have done and it worked so I can now all my photos.
Thank you all for your help.