Saw this on GTALUG list, and reposting for your information:
https://www.phoronix.com/scan.php?page=news_item&px=Ubuntu-17.10-BIOS-Corrupter (https://www.phoronix.com/scan.php?page=news_item&px=Ubuntu-17.10-BIOS-Corrupter)
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1734147 (https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1734147)
Ubuntu has removed 17.10 from their downloads section, indicating the problem. They will post it again when it has been fixed but meanwhile, if you have already downloaded it, don't install it.
Jesus, this is bad. I Wonder how widespread this issue is. Thanks for sharing, William.
Ubuntu 17.10 has been fixed (http://news.softpedia.com/news/ubuntu-17-10-artful-aardvark-respin-isos-are-now-available-to-download-519346.shtml) and has now been reposted.
Thanks for the update. I guess there is a risk in being too early an adopter!