EDIT: just make sure you write the image to the usb as EFI if your pc has UEFI instead of MBR, at least Rufus should default to efi mode since it has been the standard for a good while now.
Older machines used legacy BIOS, but for a number of years now UEFI has been the norm, and for security reasons you should prefer efi. But the mobos’ firmware still supports legacy mode but it needs to be enabled in the BIOS settings.
So if the machine is set to boot in UEFI mode, a live USB drive which is written for legacy BIOS won’t be able to boot at all.
Rufus by default (without changing settings from a drop-down menu) writes the ISO to a USB drive as efi with legacy support so you should be fine whatever your BIOS settings.
Now I haven’t used Unetbootin for efi but since I’ve only used it for legacy BIOS machines but still it also provided a working bootable thumb-drive every time I needed one so it still remains as a piece of software worth recommending.
OK so maybe I am missing options menus on Unetbootin but it did not install the .iso to the usb. It did the same shit that StartUpDiskCreator did… A bunch of folders that will work not as ‘bootable image’ if I switch boot order in BIOS on my lappie
If you are using Ubuntu as the current OS then try mkusb. It has a wizard to follow and makes it easy to simply select the action type (‘live-only’ for instance), select iso, drive, and confirm. I never liked Unetbootin on any OS. USB-image-writer also works well and is a bit more simplistic. I believe both can be found in PPA’s. There is an Ubuntu community page for mkusb here - https://help.ubuntu.com/community/mkusb
No worries, I’ll guide you through step-by-step in PM so the thread doesn’t get flooded and the forums spammed.
Because chat and Discord is too mainstream ;D
Just a word of warning. If you cannot comprehend the instructions in the link, your are in for a world of hurt. I hope that @Baz can help you. I recommend looking at some youtube videos, seriously so that you can visually see what is being recommended to you through words.
Now, you mentioned that you do not have Windows. Are you using a Mac?