Check if the drive is set to RAID (not AHCI) or not in the BIOS as DELL configures new system to boot with RAID on
I upgraded my bios to 1.9.0 it installed successfuly however it boots into recovery. Now under boot configuration and boot sequence it lists my ssd as "UEFI RST KGB40ZNS256G NVMe KIOXIA 256GB Y0EOG9ZGQUM1". There is nothing else listed in the boot sequence. When I click add boot option then browse for files, file explorer shows 3 items that all say NO VOLUME LABEL. I tried diskpart/ list disks in cmd and it said there are no disks. I don't believe that this is a problem with the ssd because everything was fine before the bios upgrade. [IMAGE]  Express service tag: 
Inspiron 7506 2in1 not booting after 1.9.0 bios upgrade