If by chance you're at a Windows computer, there's also a couple of more options to create a bootable ISO on USB stick.
The first, and one I had used for years is the Universal USB Installer, a portable app. Just have your USB stick plugged in, know where your Linux ISO is, it's basically a 3-4 step operation & on BIOS (MBR) based computers, have had a near 100% success rate. This one also optionally allows for a Persistence file, which can be useful for saving sessions (one example). Still one must be stingy with only up to a 4GiB persistence file, if updating, apply only what's needed.
The second, is Rufus, and like UUI above, portable. It allows one to create a bootable USB stick for both UEFI & BIOS based computers & is now the one I use more often because am having to deal more with UEFI somewhat more than BIOS based models.
By chance, the opening picture itself explains it all. Just make sure that it's created for the intended computer type, there's also a 3rd option that allows for CSM install (installing an unsupported OS) on UEFI computers, or installing newer OS's the old fashioned way, even on newer computers (though not what I recommend, GPT has an advantage in speed & stores the boot record in more than one hidden area of the drive). The main example being Windows 7, though there are legit workarounds to that, as well as Vista, however EOL is approaching for the latter. Most 64 bit Linux distros has the needed keys for a UEFI install, so if that's the type of computer you have, go for UEFI with GPT partition scheme.
That's why some bootable apps comes up short, in not selecting the right type of install method for the intended computer, especially if the USB stick is performed on a different one. Rufus eliminates this, as long as the right option is chosen.
Since all that I know is that you have a HP computer (no model), I can't say for sure which is the best of the two to use, while Rufus can create a USB stick for MBR based computers, doesn't offer the Persistence option for if needed. That's enough space to install & test drivers & keep the settings for another session.
Good Luck & don't hesitate to ask questions if needed.