How to create a bootable USB stick on Windows To run Ubuntu from a USB stick, the first thing you need to do is insert a USB stick with at least 2GB of free space into your PC. The easiest way to put Ubuntu onto your stick is to use the USB installer provided at pendrivelinux.com . You’ll need to download and install and follow the instructions. Download Pen Drive Linux's USB Installer › 1 Select 'Ubuntu' from the dropdown list. 2 Click 'Browse' and open the downloaded ISO file. 3 Choose the USB drive and click 'Create' . sumber:http://www.ubuntu.com/download/desktop/create-a-usb-stick-on-windows