I don't know where else to file this, and it could be in the wrong place.
In Windows Explorer (I guess that's what it is called under Windows 7), the displayed thumbnails for all of my images are the System Default Image instead of a thumbnail of the actual image. I even get the System Default Image at the lower left hand corner that gives file information.
My other Windows 7 machine actually shows a thumbnail of the image, but this one only displays the System Default Image.
Same goes for icons, folders that contain images, etc.
How do I set this to show me the actual image's thumbnail?