Watch this video to learn how to create Bootable Flash Drive for Ubuntu 14.04 LTS or just about any distribution of Linux.
STEPS
1) Download Universal USB Installer from http://www.pendrivelinux.com/universa...
2) Download Ubuntu iso file from http://www.ubuntu.com/download/desktop/
3) Run Universal-USB-Installer-1.9.5.8.exe
4) Click on "I agree" for License
5) Select the Linux distribution.
6) Select the iso file for Ubuntu
7) Select the flash drive
8) Check the Format checkbox.
9) Click create.
10) Once the installation is done, close the Universal USB Installer.
11) Use the Bootable Flash Drive to install Ubuntu 14.04 LTS on any machine.
NOTE: Make sure to select USB Flash Drive as the First Boot Device in your Bios.