In case you don't know, Windows 10 reduces the quality of JPEG images you set as the desktop background. If you compare the original image and the wallpaper, you can see that the wallpaper has minor JPEG artifacts. The issue is not new to Windows 10 - Windows 8 and Windows 7 are also affected by this issue. But Windows 10 is the first version where a solution is available. Let's see how to disable wallpaper JPEG quality reduction in Windows 10.
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