I did installed sp94861.exe (HP PC Hardware Diagnostics UEFI) with everything else. Ran Hp Scan Now and did everything it suggested. Ran their Operating System Diagnostics again today - everything zips through until Running Windows update Diagnostics
which runs on and on but eventually it says no issues found on each segment.
I ran the DISM CheckHealth, scanhealth, and restorehealth, then scannow and got
Microsoft Windows [Version 10.0.17763.557]
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C:\WINDOWS\system32>DISM /Online /Cleanup-Image /CheckHealth
Deployment Image Servicing and Management tool
Version: 10.0.17763.1
Image Version: 10.0.17763.557
The component store is repairable.
The operation completed successfully.
C:\WINDOWS\system32>DISM /Online /Cleanup-Image /ScanHealth
Deployment Image Servicing and Management tool
Version: 10.0.17763.1
Image Version: 10.0.17763.557
[==========================100.0%==========================] No component store corruption detected.
The operation completed successfully.
C:\WINDOWS\system32>DISM /Online /Cleanup-Image /RestoreHealth
Deployment Image Servicing and Management tool
Version: 10.0.17763.1
Image Version: 10.0.17763.557
[==========================100.0%==========================] The restore operation completed successfully.
The operation completed successfully.
C:\WINDOWS\system32>sfc /scannow
Windows Resource Protection could not start the repair service.
C:\WINDOWS\system32>