- Download iso file from lenovo support website
wget https://download.lenovo.com/pccbbs/mobiles/jbuj57wd.iso
- Convert iso to img
geteltorito.pl -o bios.img jbuj57wd.iso
- Copy img to an USB key
sudo dd if=bios.img of=/dev/sdc bs=4M
sync
- Reboot the laptop and press
F12
when the lenovo logo appears - Select the usb key to boot on
- Follow instructions