cross-posted from: https://lemy.lol/post/30548063
I have an old hp pavilion dv6 and I installed windows 7. Then i tried installing Ubuntu 24.04 and the USB wouldn't boot, it just showed "GRUB" in the top left of the screen. I tried with another USB and the same issue emerged.
I would look at BIOS secyre boot/boot mode options. And depending on the age of the PC whether it supports UEFI or you need a legacy boot.
Looked everywhere and there is no secure boot option in BIOS.