Hi Raymond,
Thank you for contacting Microsoft Community.
I will surely help you to fix this issue.
By design, you cannot edit and save pictures in Windows Photo Viewer. However you can zoom and view the pictures using Windows Photo Viewer. For additional information about Windows Photo Viewer, refer the article.
http://windows.microsoft.com/en-US/windows7/View-and-use-your-pictures-in-Windows-Photo-Viewer
Also you can use Photo App to edit your pictures. For more information refer to the articles.
http://windows.microsoft.com/en-au/windows-8/editing-photos
Hope this information helps. Reply to the post with an updated status of the issue so that we can assist you further.