Creating a USB media using UNetbootin isn't recognized as booting media

Unetbootin does not create the Ubuntu installation media properly.
Use the Disks tool (gnome-disk-utility) to create the USB media.

Open Disks, select Restore Disk Image from the menu on the top right.
Choose the ISO file and the USB drive to write it to and start restoring.

When you want to create the installation media from within Windows,
boot Windows, open command prompt as administrator and execute :

diskpart
list disk  
select disk *  
clean  
create partition primary  
active  
format fs=fat32 quick  
assign letter=**

Note : * = number of USB drive | ** = select a free drive letter
Now mount the ISO file and copy the content to the USB disk.

Use this git clone for a faster bootable usb creator.

git clone git://github.com/pbatard/rufus

Alternative Windows mirror: https://github.com/pbatard/rufus/archive/v2.8.zip

It can also format the partition to FAT32 easily

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