@ Yu Ning, I hope the following information helps :-)
I updated/dist-upgraded the system to be up to date (Ubuntu 14.04.2 LTS). I also purged and re-installed usb-creator-gtk. Collected output: ----- tester@tester-SATELLITE-PRO-C850-19W:~$ sudo sed -ri '/syslinux_(var|exe)/syslinux/g' /usr/share/usb-creator/usb-creator-helper sed: -e uttryck #1, tecken 30: oavslutat "s"-kommando tester@tester-SATELLITE-PRO-C850-19W:~$ sudo sed -ri 's/syslinux_(var|exe)/syslinux/g' /usr/share/usb-creator/usb-creator-helper tester@tester-SATELLITE-PRO-C850-19W:~$ sudo killall usb-creator-helper ; sudo /usr/share/usb-creator/usb-creator-helper usb-creator-helper: ingen process hittades DEBUG:root:['mount', '-r', '-o', 'loop', b'/home/tester/H\xc3\xa4mtningar/vivid-desktop-i386.iso', '/tmp/tmpwojzqdo0'] DEBUG:root:['mount', '-o', 'remount,rw', dbus.String('/dev/sdb1')] DEBUG:root:WTF?!: /dev/sdb1 DEBUG:root:['mount', '-r', '-o', 'loop', b'/media/tester/ADE8-AECA/casper/filesystem.squashfs', '/tmp/tmpcfaxrhpt'] DEBUG:root:['/tmp/tmpcfaxrhpt/usr/bin/syslinux', '-f', dbus.String('/dev/sdb1')] ----- Startup Disk Creator finishes with the message window "Failed to install the bootloader". Comments to the collected output: sed: I think you missed an s in the instruction (so copy and paste did not work out of the box). WTF?!: My Sandisk Cruzer Blade 4GB is cheap, but reliable, and should do well also for the Startup Disk Creator ;-) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1325801 Title: failed to boot from USB disk with error: gfxboot.c32: not a COM32R Image boot: To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-cdimage/+bug/1325801/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs