Disable Wallpaper for Only One Monitor

I have three 4k monitors, all connected via DisplayPort. I recently began using the HDMI port on my video card for audio. However, Windows will not enable the HDMI port for only audio. It has to be enabled as a display, as well. So, now I have a not-physically-existent 800x600 display off in a corner. It causes me no problems there.

But, there is a quirk: I have lots of 4k resolution wallpapers set to shuffle. I'm noticing that I'm not seeing many of them any longer, as Windows 10 is rotating wallpaper onto this 800x600 display.

So, how do I get Windows to stop putting my wallpapers onto this fake display? Can I use the registry to hard-code a wallpaper onto this fake monitor, so that Windows 10 will skip past it when rotating through the wallpapers for the other monitors?

Relevant specs:
Windows 10 Fall Creators Update
Nvidia 1080 GTX. Real monitors: 3x Display Ports. Fake monitor: 1x HDMI port.

Any ideas?

Thanks in advance

Plankton said:

Please explain this further.
Furthermore, if your using a HDMI cable connecting it to a monitor and PC by mobo HDMI port or GPU HDMI port....it's physically connected and not Fake.

It's connected to a Receiver. It's not a monitor... but, between Windows and the Nvidia display drivers, there isn't the capability of it understanding that the HDMI port is being used for audio only. So, it has to be set to think there is a monitor connected. There is no monitor connected.

So if it's connected and you have your wallpapers to shuffle, it will shuffle through all connected monitors.

I believe that's what I was saying...

However, there are two 3rd party software that I know of that might be able to help you. Display Fusion and Ultra Mon

I appreciate the solutions. Both are paid solutions... and I was hoping for a nice, cheap registry hack that would simply force a permanent wallpaper on the non-existent monitor #4, and all the real monitors #1 - 3 to shuffle wallpapers normally.

Thanks