usb installation crashes in dual boot Windows 7

[Shrek]

Missing grub installer on Usb installing Ubuntu 14.04.01 desktop-amd64.iso.

Problem also with trying to install Ubuntu latest download 14.10-desktop-amd64.iso on Usb.
Not possible to make excecuteble on Usb stick.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: ubiquity 2.18.8 [modified: lib/partman/automatically_partition/question]
ProcVersionSignature: Ubuntu 3.13.0-32.57-generic 3.13.11.4
Uname: Linux 3.13.0-32-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
CasperVersion: 1.340
Date: Sun Oct 26 20:07:31 2014
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/ubuntu.seed boot=casper only-ubiquity quiet splash --
LiveMediaBuild: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
ProcEnviron:
 LANGUAGE=nl_BE.UTF-8
 TERM=linux
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=nl_BE.UTF-8
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)