Yes, you can now have Windows Spotlight as a desktop background. As explained in detail in this post, simply open Personalization settings > Personalize your background setting and select Windows ...
There will always be moisture and humidity in a bathroom, and this can cause problems if it weakens the paste that keeps the wallpaper attached to the wall. Also, if you suffer a plumbing leak ...
you cannot set an image on one desktop and solid color or slideshow on another desktop. To get started, you can click on the Desktop icon on your Taskbar to display all the available desktops.