At the beginning of my Odyssey, I investigated all folders and registry keys belonging to Panda Dome. Therefore, I also found the location of these background images. Additionally, I analyzed the registry accesses of Panda Dome, in particular with regard to the background images. But I have not yet identified the core of the problem. Unfortunately, it is in my nature to solve problems. The pictures are totally unimportant, but I still have to solve the problem. Especially if it works in my other partition. But in any case, thanks for your efforts!