Generally not advised to install Ubuntu 17.10 presently, at least on certain hardware. There's a nasty bug that causes serious problems with BIOS (as in prevents ability to boot from USB or alter BIOS settings).
https://www.theregister.co.uk/2017/12/21/ubuntu_lenovo_bios/ https://linux.slashdot.org/story/17/12/20/1724244/ubuntu-1710-temporarily-pu... etc.
Canonical apparently plans to re-release 17.10 (hopefully with a distinguishing point version number?) after this issue is corrected.