Hi Neil,
I have updated the display drivers via the Dell website but still now working.
I also found the following driver from softpedia
https://drivers.softpedia.com/get/GRAPHICS-BOARD/INTEL/Intel-Graphics-Driver-26-20-100-7372-for-Windows-10-DCH-64-bit.shtml
However, my CPU is not listed (i tried and does not work as well)
Thanks,