When you see the System76 logo on the screen: Laptops
You'll need to tell the computer to boot from the Live Disk. Once you have the disk made, reboot your system. Please see our instructions for making a live disk of Pop!_OS here. On a fresh install of Pop!_OS 18.04, systemd-boot is used rather than the GRUB boot-loader, and the following instructions do not apply please refer to the systemd-boot section on this page. You will need to install to /dev/sda not /dev/sda1. If you need to configure grub-pc (for example, after an update), installing grub to all devices will break GRUB. Sometimes, GRUB or systemd-boot can break, and it may not let you boot into your computer to fix the problem. It is also responsible for allowing the user to select between multiple operating systems at boot. A boot-loader takes care of getting the operating system started up. Systemd-boot is the boot-loader for Pop!_OS 18.04 and above while GRUB is the boot-loader for Ubuntu and Pop!_OS when installed in Legacy BIOS mode.