Assuming that you've checked that the BIOS has enabled booting from USB, and the boot priority is USB before HDD, here's what I think.
I am pretty sure that the problem is that the BIOS of your laptop has only technical means to boot from a drive that has an MBR partition table. You need to configure your USB-preparing tool of choice accordingly, as nowadays the default for many is GPT partition table and UEFI, which superceded the more basic BIOS and MBR.
Trying to boot a USB drive with a GPT partition table or for a UEFI system wouldn't work in your machine, which is what happens currenty.
Try using
Rufus from a Windows PC (which I assume is what you have now) and setting the thumbdrive for a MBR partition scheme and a BIOS System (
not BIOS and UEFI, just BIOS). Check also
this article for more information, ignoring the Windows 10 part.