Iomem=relaxed error lenovo ideapad flex 5i

Good morning, I’m new to this sorry if the question was already solved before I was reading looking for the subject but I didn’t get a solution, I recently bought this laptop with Chromeos flex, but due to limitations of the same I wanted to install Windows through the change of the bios, following the instructions on the Internet, remove the battery connect the pc and activate developer mode, Then I start it and go to the browser and click CTR+ Alt+ T then I type shield giving access to the console, Another way was ctrl+alt+f2 but in this case the screen is black and it doesn’t do anything else so I couldn’t use it, well going back to the subject when executing the command "cd; -LO… " for the script I get this error “You may need to add ‘iomem=relaxed’ to your kernel parameters,
or trying running from a Live USB with a more permissive kernel (eg, Ubuntu 23.04+).” .as I was reading is because the kernel I guess because it will have the latest update of Chromeos does not let me make modifications then as I should pass a live usb or modify something in the kernel, now the question how do I do to do one of both things or degrade the Chromeos, I already tried with a usb live with Ubuntu but I get image not valid by ctrl + u, I also read the ctrl+l but it says I don’t have the permissions