I have a Windows 10 laptop with a high resolution (3840×2160), high DPI built in display. I have two "standard" external 1920×1080 monitors attached to the laptop to use for extended desktop. One of those is connected by HDMI, the other through DVI connection to a USB3 hub. The mouse cursor looks fine on the laptop screen. When I drag the cursor onto either of the external monitors, the mouse cursor grows to be about 5x bigger than it is on the laptop screen.
I've installed the latest NVidia drivers and tried adjusting scaling settings for each monitor with no success. I've tried them connected one at a time and swapping the connections between the two monitors, but it's always the same.
Nothing else I can see is affected. Icons, applications, pictures, background images, etc are all fine. Just the mouse cursor grows to ridiculous proportions on the other screens.