Over at photo.SE we rarely get questions related to wallpapers of operating systems. As long as they are about how to take the image, we try to answer them.
But some are about meta information like the location where the image was taken for example. That's off topic as far as photography goes.
I'm wondering if Super User is the right place to ask such questions and if askers can/should be redirected here.
My train of thought is that some operating systems get such media from the community. Somebody knowledgeable about an operating system might be able to tell who took an image that's used as a wallpaper/lockscreen/... or what process led to it being chosen to be included in the operating system etc.
Both these examples would be off topic here. We've had questions in the past on finding where the wallpaper is stored on a system (for recovery purposes) but where a photo was taken does not really involve hardware, software or networking.
Your sample questions are off topic. If you were asking how to set this as a default background for the lock screen as if you were issuing a group policy for a company. That would be a bit more on topic as long as you were asking how to navigate the registry and what the files were that you changed and how to fix them.