How to boot from a USB drive using the command prompt?

Hello,

First of all, please know that I have already tried all the standard troubleshooting steps when a PC won't boot into the OS.

Here is a description of my problem:
- My computer, which was running Windows 10, does not boot into the OS at all.
- All options offered by the repair/restoration utility have been tested without success.
- I wish to reinstall Windows 10 via a bootable USB drive; however, I cannot access the BIOS and/or the boot menu because my “F” keys do not seem to work at startup.

Here’s what I would like to do:
I would like to boot from my ISO (on the USB drive) using the command prompt provided by Windows in its repair utility. Does anyone know the sequence of commands to:
- Find out the letter of the USB drive
- Navigate to the USB drive
- Launch the ISO image present on the USB drive for the system to boot from my drive

Thank you in advance for your help!
Of course, I am open to any suggestions that do not involve the command prompt!

Best regards,