Creating an bootable USB or DVD is very simple just follow this steps
An IS ISO file is ( windows 8.iso )
Windows USB/DVD download tool
System with basic requirements
First all we have to do is locate an iso file in the system.
Then select the media device is USB or DVD
Then start process by clicking begin copying button
Wait until it complete….
Once it’s done you can directly install the OS in you system by changing boot priority ie DVD ROM or USB floppy.