To create bootable USB flash drives Rufus is used. It is small application and provides the facility of formatting and creating USB drives. For example one can say pen drives, memory sticks etc.it is used in some specific places for creating the USB installation media in which bootable ISOs is required like windows, Linux etc. working on the system having no operating system in that. Here user needs to run utility of low level. Even Rufus is small utility then also provides important things to computer. it works very fast and it is reliable to. Once you will be having Rufus you will surely enjoy the features given in it.