Installer package crashed

[Ken Vaux]

Installing ubuntu 14.04 on Acer Aspire s2-92 that had windows 8.1 installed. Installer crashed. Installing from USB stick. Installer downloaded from Ubuntu site

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: ubiquity 2.18.7
ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
Uname: Linux 3.13.0-24-generic x86_64
ApportVersion: 2.14.1-0ubuntu3
Architecture: amd64
CasperVersion: 1.340
Date: Sun Apr 27 17:11:06 2014
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/ubuntu.seed cdrom-detect/try-usb=true noprompt floppy.allowed_drive_mask=0 ignore_uuid boot=casper only-ubiquity quiet splash --
LiveMediaBuild: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
ProcEnviron:
 TERM=linux
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

[Ubuntu Foundations Team Bug Bot (crichton)]

Exception during installation:
Apr 28 00:10:45 ubuntu /plugininstall.py: Traceback (most recent call last):
Apr 28 00:10:45 ubuntu /plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 1770, in <module>
Apr 28 00:10:45 ubuntu /plugininstall.py: install.run()
Apr 28 00:10:45 ubuntu /plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 78, in wrapper
Apr 28 00:10:45 ubuntu /plugininstall.py: func(self)
Apr 28 00:10:45 ubuntu /plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 241, in run
Apr 28 00:10:45 ubuntu /plugininstall.py: self.configure_bootloader()
Apr 28 00:10:45 ubuntu /plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 1026, in configure_bootloader
Apr 28 00:10:45 ubuntu /plugininstall.py: "GrubInstaller failed with code %d" % ret)
Apr 28 00:10:45 ubuntu /plugininstall.py: ubiquity.install_misc.InstallStepError: GrubInstaller failed with code 1
Apr 28 00:10:45 ubuntu /plugininstall.py: