XPS 15 9570 WHEA_Uncorrectable Error (Almost Solved)

 * No more BSOD after disabling the Intel Graphics Display adapter and just using the Nvidia Graphics *

My client brought me a six month old Dell XPS 15 9570 that was crashing regularly with the WHEA_Uncorrectable Error blue screen.
He spent hours on the phone with Dell support and they finally told him to do a clean install at which point he brought it to us. (only had basic hardware warranty and all diagnostics passed)
-We formatted his SSD and did a clean install of W10 1903
-We then tried to install drivers but could not download as it was blue screening frequently. 

Should a clean install crash by default on this model?
-Downloaded latest drivers on another computer and transferred.
-Installed drivers in Dell proscribed order: Chipset, Audio, Intel Video, Nvidia, and the rest
-Then ran Support Assist which found 3 more.
-Still crashing intermittently

Ran Intel Driver Utility which found a much newer Intel Video driver, but it stopped in the middle of  installing, telling me to check with the manufacturer for their version.

Should we try installing the previous Dell version of the Intel video driver?
Maybe this was brought on by Dell Support pushing the newer driver?
This all started about the time that driver was installed in September 2019

Or could this be a defect in the Intel Graphics chip on the processor?

Thanks for any responses.
jorsing