I am not sure I fully understand your problem, but you can try to sort out the picture shown on your desktop as follows.
Right click on an empty area of your desktop and you will get a small menu.
From the menu select Properties and a window is displayed.
From this window select the Desktop tab.
This is where you control which pictures appear on your desktop.
Try selecting a desktop background of None and press OK and see if that helps. That will remove all pictures from the background.