I bought a new empty HP ProBook 450 G7 laptop without any operating system. I entered into BIOS and made sure that USB Storage Boot checkmark has been set under the Advanced tab in the Boot Options section:
I also successfully created bootable USB drives with Rufus from the Ubuntu 20.04 desktop amd64 iso, but when I start my laptop I sequentially see the following screens:
Boot menu and Automatic boot of FreeDOS:
Load FreeDOS including HIMEM XMS-memory driver:
In the end I get such a screen with just
C:\> in the top left corner of a blank black screen.
but when I'm booting from USB drive I expect to see a screen with a choice of an Install Ubuntu action.
What's wrong with the settings of my BIOS? What could be the root cause of this problem? What should I look for?