When I open a photo in Windows Live Photo Gallery a small square part of the picture is missing or the same size small square will be a bunch of small white squares. If it opens with the small white squares it will go away by itself in a couple of seconds. If part of the photo is missing, that does not go away. I can make it go away by increasing the little slide to the bottom right of the photo which makes the photo larger.

Why is this happening?

Thank you,

     TomS