Everything else seems to be working fine after adding a second monitor to my Windows 10 setup. I can drag application windows from one monitor to the other, for example, and the mouse moves between them OK.
However, when I launch Google Chrome, it opens as a completely black rectangle. Please see pic. Since I cannot see what I'm doing in Chrome, not sure how to approach the problem.
EDIT: Actually, I removed the original video card and monitor and installed different video card and two other monitors.
EDIT2: I clicked on the top right corner and the black rectangle closed. Now, when I try to open Chrome, it is a white rectangle.