Strange jpeg handling in Windows 8?

Question

JPEG

Moved from Windows 7 to 8. Now I observe the following unusual thing.
Win-8 tools began to render jpegs with stripes. Incl. when displaying wallpaper on the desktop.
Open the image with Windows Viewer. From afar, everything is fine:

In the approximation, we see an opportunity in the form of stripes that are absent in the original:

Let's put the picture on the desktop - we will see the same stripes, but on a different scale.
If we open it with the Office-2003 viewer and zoom in, then we don't see anything like this:

If we convert this jpeg to png and open it using Windows tools, we don't see any artifacts either.
From this I conclude that the crookedness of the viewers and invalid video card drivers have nothing to do with it.
Q: Has anyone experienced this and how did you resolve it? Do you have such an effect?

Answer 1

For some reason, I don't see the bands in the second image. Where exactly should they be?

Answer 2

And when you install JPG on the background, it is strongly pinched. I had to convert to PNG.