Installing Linux Mint on a Windows 10 Lenovo laptop

After burning a live USB onto a flash drive, I booted and found the keyboard wasn’t working. I used the on-screen virtual keyboard (under Accessibility in the settings) to type into the Terminal (via)

xinput list
xinput --set-prop 12 "Device Enabled" 1

where 12 was the id given for the keyboard (“AT Translated Set 2 keyboard”)

The keyboard worked but the trackpad ("Glass sense touchpad") did not, only the touch screen. This suggested editing the grub file at /etc/default/grub

GRUB_CMDLINE_LINUX_DEFAULT="psmouse.synaptics_intertouch=0 quiet splash"

but I don't have a grub file while only in the live USB, so I decided to install first, fix hardware later.