Hi vikkidelle donne,
Thank you for posting your query in the Microsoft Community. If I understand you correctly, you have an issue with the photo app not displaying the pictures.
I understand that it must be frustrating, but rest assured, we are here to help fix your issue and guide you in the right direction.
Let us start with a few questions-
1) Is this issue specific to the photo app?
2) Have you made any changes on the computer?
I would like more information regarding the issue.
Method 1 –
I would have you run the Modern UI App troubleshooter.
Method 2-
I would have you refer the article-
What to do if you have problems with an app
http://windows.microsoft.com/en-us/windows-8/what-troubleshoot-problems-app
Method 3-
I would have you uninstall and reinstall the app from the Window Store.
Refer the steps-
a) Click on “start” and then search for your app.
b) Right Click on it and select “Uninstall”.
c) You can download it from the Windows Store.
Do let us know if you need further assistance. We will be happy to help.
Thanks.
