make the ubuntu 14.x dvd using brasero's iso option or startup disk creator and
boot in to the ubuntu installation by selecting usb on boot option
use the custom install and select the installation run over the logical partition /dev/sdx1 .
when its turn of grub to install select the fisical pendrive /dev/sdx.
IF YOU SELECT YOUR HDD/SSD you will brake windows grub and that is other post .
if you want to make the ubuntus disk in windows just mount the ubuntu iso in demons tools and paste all file in a cd and burn .
if you dont have a good usb3 or a thunderbolt its going to be slow .., so i let you a link to a persistencepersistance live usb