try right clicking on an image ,choose open with ,if photo image is there choose it if it not there then choose othere programs and fine it there .
Also to edit the program that opens you images go to mycomputer /tools/folder options /file types and edit there the program you want to use for opening you image file types .

Also you may want to reinstall photoshop if you created all the images with it and saved them as adobe file types ,and adobe did cost you a lot of money just to have it sitting on the shelf ,didn't it !!!

perhaps,your file is corrupted,you can try a popular Outlook recovery tool called Advanced Outlook Repair to repair your PST file. It is a powerful tool to recover messages, folders and other objects from corrupt or damaged Microsoft Outlook PST files.

Detailed information about Advanced Outlook Repair can be found at http://www.datanumen.com/aor/

And you can also download a free demo version at http://www.datanumen.com/aor/aor.exe

Alan