failed writing grub in UEFI install - win8.1 based Windows 10

[John Andrejsons]

I revived my ubuntu on a Windows 7 based Windows 10 laptop after a memory upgrade and upgraded further to the 16.04 LTS. I was so impressed with the performance that I undertook to install it on my friends Windows 8 PC. He chronically resets to Windows 8.0 factory specs when his system slows to non-usability, I have a Windows 8.1 based Windows 10 AE PC, as well. The report is from this one.

I am installing from a memory stick. After some booting struggles with legacy settings, I thought that I had it right. The stick seems fine and it did install somewhat successfully on the Windows 8 system and I get a four item grub menu on boot. ununtu goes to black and Windows boots fine. I can get to ubuntu in safe mode and I shall work on that.

Meanwhile this install starts with about twenty more "things"(I am not linux-literate) than the 70 or so on the other system at the beginning of the install and I get some mount dialogues and I chose the easy way that does not allow repartitioning. I avoided the proprietary code part so as not to disturb the safe boot settings.

I don't know if this background helps more than the system generated data.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: ubiquity 2.21.63.2 [modified: lib/partman/automatically_partition/question]
ProcVersionSignature: Ubuntu 4.4.0-31.50-generic 4.4.13
Uname: Linux 4.4.0-31-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CasperVersion: 1.376
Date: Tue Sep 27 21:39:03 2016
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/ubuntu.seed boot=casper quiet splash ---
LiveMediaBuild: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)