Thanks. Not sure about the details. We have a lot of 2 screen users. Not so sure about how many with 3 or more.
Here is one users message:
“Unplug one monitor it will work then. I have 3 monitors on a windows 10 operating system using the Dell small interface box. The monitor I unplugged was using the USB port and a j5-create adapter for USB to VGA. I am still using the Ultramon software. [http://www.ultramon.com].”
I hope you know that a user-space program (ie your clarion program) runs in ring 3. To create BSOD code has to be running in ring 0. So you either have a hardware problem, or a device driver problem.
FWIW I’ve been running 3 monitors for probably 15 years now, with all versions of Clarion and endless Clarion programs, and I don’t get a BSOD. The only time we get BSOD’s (and it’s pretty rare) is when hardware is failing. (Memory or hard-drive being the most common.)