I can’t boot to Flash Drive containing Ubuntu

I’ve used Rufus to create a bootable pen-drive with Ubuntu 19’s ISO. Then going into BIOS and selecting USB to boot first (Not UEFI option of the same), then I received this error: https://imgur.com/s4Rzb9I

I contacted a Discord server for help. Its administrator said me to try 18.04 version instead. I did the same process with Rufus, now following this tutorial: https://tutorials.ubuntu.com/tutorial/tutorial-create-a-usb-stick-on-windows#0.

Then booting by the same way I received this error: https://imgur.com/etezYw5

After this I’ve tried to put this same USB with Ubuntu 18.04 in another computer, which I don’t have the specs to show, only saying that the specs are lower than my actual computer. In that another computer, the error was this one: https://imgur.com/FKjqKgc.

I’ve hashchecked the ISO in the two cases, all hashs was the same as official provided by Ubuntu’s website.

My Motherboard and BIOS specs


vendor: ASRock

model: H61M-HVS

Complete System details: https://pastebin.com/izzX7Gv4

I’m on a Windows 10 computer, all instructions below need to be run in CMD or Powershell.