Cannot install full Intel graphics driver

After a series of problems we needed to install Win10 from a MS media thumb drive. After several reboots we have all drivers installed except the full Intel graphics driver which we need to correct over scan on our display. Device manager show the 2018 MS driver for the UDH 600 graphics adapter. We cannot get the full Intel update to install (via Intel Driver and Support Assistant). Attempting to install the driver results with the message "The driver being installed is not validated for this computer..." and installation terminates.

Any hints to get the full Intel driver with over scan correction reinstalled? (This worked before our problems). TIA.

L/P Delta.