I'm installing Remote Utilities Host on a Windows 10 computer and am getting an alert that the monitor driver is unsigned. In device manager, the PnP-Monitor Lock (Standard) device has an explanation point showing its an unsigned driver. I've installed the host on Windows 10 in the past and not had this issue.
Then it's either an outdated root certificate or intermediate certificate problem. As an example, here is how the monitor driver properties window looks now on our test PC, RU version 18.104.22.168 downloaded from the site.