Hi,
Try this ...
Start .....type in ......cmd......right click on the cmd.exe that appears top left of screen > Run as Administrator
At the prompt type....C: then ENTER
You will see C:\>
Now type .....
ATTRIB -h *.* then hit ENTER
(there is a space between ATTRIB and -h and between -h and *.*
If there are hidden files on the C: drive this will reveal them.
I am thinking that the photos may have been hidden.
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If the above doesn't work ....
Try running System Restore from Safe Mode
Switch on > constantly tap F8 about once per second > select Safe Mode from the list of options.
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Have you looked in the Recycle Bin ?
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Try Recuva software
click here
If they have been deleted you may be able to locate them ( or some of them ) with this.