What I want to archieve is having a wallpaper slideshow on my monitors with both monitors using the SAME wallpaper. Now it seems like they both just choose a random wallpaper every 5 minutes.
it was possible in vista right?
To do that, you need to have a video card that supports it. AMD does the Eyefinity grouping. This lies to the computer making it think the 2 monitors are 1 display. You taskbar also extends across both monitors.