Once again I bought a laptop, a Dell XPS 13 9300, and tried to install Ubuntu as a dual boot (along with Windows 10). I expected no problems but was met with some surprises. Long story short, below are the expected and the actual steps needed. Expected steps: Enter BIOS/UEFI Change boot order Boot from USB device and install Linux Actually needed steps: Disable device encryption on Windows Enter BIOS/UEFI Change boot order Disable RST (Enable AHCI) Boot from USB device and install Linux Disable device encryption on Windows This step is only needed to install Ubuntu as dual boot alongside Windows.