Taskbar and windows move to primary monitor upon wake from sleep

I have three Acer monitors, all at the same resolution. My middle monitor is designated as the primary monitor. My middle and left monitors are connected with DisplayPort and my right monitor is connected by DVI-D. All through a Gigabyte GTX 1080Ti

I have my taskbar and many of my windows opening on the right monitor (browser, email etc).

When my homebuilt Win10 PC wakes from sleep, all the windows and my taskbar are now on my middle monitor. This only just started happening. I have no idea what is causing it but it's doung my head in having to keep moving them all over constantly.

Any advice gratefully received please.

Anyone? This doesn't happen if I shut down the PC, only when it resumes from sleep.

It's becoming a major pain to unlock the taskbar, move it to my right-hand monitor, resize it and lock it again.

Brink said:

Does making the right-hand monitor your main display sort this?

Change Main Display in Windows 10 | Windows 10 Tutorials

Thanks for the response; I appreciate it.

Yes it does work but then all my programs open up on the right monitor. My middle monitor is 4k and my left/right monitors are 1080. I use the middle one for video editing, composition, gaming and movies.

It's worth noting that i've had all three for over a year and this only started happening within the last week. I have not added any new software. The only thing has been a Windows update to put me on the latest build on Win10 Pro.

Still getting this and it's proving to be a complete PITA. I have to get this fixed.

Anyone?