I have a windows 10 PC. I recently connected it to two 49" ultrawide monitors and adjusted the resolution under display settings to the appropriate setting. Since the old background I had was set for a standard 23" screen, it was stretched and distorted so I tried to change it. Every time I try to change the background to another picture it just goes to a default black screen.
The only picture it lets me set as the background is that original picture from before, all others just get set to a solid black background.
Not sure why hooking up new screens would affect the ability to set the background?