Secure boot is disabled. When you enable legacy boot it gets disabled automatically.
As I said I am able to boot under legacy, just then no OS or setup runs, it crashes.

NavyLCDR - Idont want to...

I have two Dell Inspiron 3250 that are a month old. They are both set to legacy boot and I can boot Win7, Win10, MSDART, etc without issue. I just ordered an identical system and setup the BIOS/UEFI...