This query has come up before. If I remember rightly, it's an Internet Explorer quirk: your image magnification is stuck on >200%, so you're only seeing a portion of the border of the greatly enlarged image.
Check the % magnification setting shown at the right-hand side of the status bar at the bottom of your screen and click on the dropdown arrow to choose 100% or less, to shrink the image to fit your screen size. Hopefully, problem solved!
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