Now How to create bootable Ubuntu Live USB drive Next you need to make changes in the BIOS to boot your Ubuntu USB. For that, while your system is rebooting press F2 or Delete button in the keyboard (depending on your motherboard it should be F1, F2, F12, ESC, Backspace, or Escape) to enter into Bios setup. Now change the startup order to boot USB by default. Save the changes and restart the system. Now you will have Ubuntu running from USB drive. Now how to boot from a PC that has no USB boot support Some old motherboard doesn’t support USB booting. But you can add USB boot support for such PCs with the help of a small program called Plop Boot Manager. Read here for how to do that.
