Tried to install on HP ZBook 15 with windows 8.1 preinstalled
| Affects | Status | Importance | Assigned to | Milestone | |
|---|---|---|---|---|---|
| grub-installer (Ubuntu) |
Invalid
|
Undecided
|
Unassigned | ||
Bug Description
It failed when trying to install grub on sda
ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: ubiquity 2.21.37 [modified: lib/partman/
ProcVersionSign
Uname: Linux 4.2.0-16-generic x86_64
ApportVersion: 2.19.1-0ubuntu3
Architecture: amd64
CasperVersion: 1.365
Date: Sun Jan 24 15:50:53 2016
InstallCmdLine: BOOT_IMAGE=
LiveMediaBuild: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
ProcEnviron:
PATH=(custom, no user)
XDG_RUNTIME_
LANG=en_US.UTF-8
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)

Your EFI system partition is corrupt. You will need to repair it using either dosfsck, or windows' chkdsk/scandisk.