I just set up a new Surface Book for a user, running Windows 10 Pro x64. Everything seems fine on the native display. I have him using the Surface Dock and two Dell 24" monitors. Everything looks great on these monitors except the mouse-over popups, such as mousing over a system tray icon. The font is easily twice what the rest of the system fonts look like. Is there a spot to check on this? I thought we looked under Display Options and tooltips were set to the same size as everything else. However, on my Windows 10 system, changing this font to something much higher doesn't cause the same issue my user is experiencing....so I don't think that is the setting I am looking for.

Thanks, in advance, for any ideas.