How to Create a bootable USB drive??

Rufus

Create bootable USB drives the easy way

Rufus is a utility that helps format and create bootable USB flash drives, such as USB keys/pendrives, memory sticks, etc.
It can be especially useful for cases where:

• you need to create USB installation media from bootable ISOs (Windows, Linux, UEFI, etc.)
• you need to work on a system that doesn't have an OS installed
• you need to flash a BIOS or other firmware from DOS
• you want to run a low-level utility

==================================================================
Source & Downloads:

 http://rufus.akeo.ie/
http://www.pendrivelinux.com