XXHighEnd

It can happen - especially with new installs (first install of XXHighEnd for the Operating System) - that the Wallpaper Coverart of XXHighEnd does not appear properly. Along with that the exhibit is in order that the normal Wallpaper has also disappeared (black background of the desktop instead).
The below procedure "sort of" solves this. "Sort of" because it never is quite clear what solves it exactly, but a sequence like the below and in maybe several attempts may get it done.

Prerequisite :

You must be able to change Wallpaper Settings to begin with. Thus, might your OS be in the stage that it sees that no Personalisation is possible because - for example - it is not Activated and which is recognized by the OS itself (this will (might ?) be so in Normal OS), then you can't set a Wallpaper to begin with. At least not by the normal means provided by the OS. Thus when this is the case (can't set a Wallpaper) it is better not to even attempt the procedure below.
Do notice that this is also related to the UAC setting - when this is Off, you might not be able to set the Wallpaper, now because of lacking Apps for it.
Notice that the UAC can be switched to On (or Off) via Rightclick in Stop and NOT by the normal means provided by the OS.

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It is assumed that  "Don't do anything with Coverart" (in XXHighEnd settings, Coverart section) is not activated. Also it is assumed that at this time Show as Wallpaper and At Attended both are active.

Press Stop in XXHighEnd.
Go to Control Panel - Personalization.
Again click Stop in XXHighEnd.
In Personalization click one of the Themes with a background. This should now appear.
Click Play in XXHighEnd. The Wallpaper Coverart will now appear (the normal Wallpaper will be disappeared).
Click Stop. The normal Wallpaper should re-appear (this is crucial).

When the above all happens as described, the Wallpaper Coverart should always appear in actual form (from the track currently playing) and when played Unattended, all should be fine as well.

Notice that when "a" Wallpaper Coverart appears *but* it is always an old one, you need to re-do the procedure or try too improve on it. Usually you are OK as soon as the normal Wallpaper is able to re-appear after stop (see above).