How to create a Bootable Windows 8.x (8 or 8.1) USB Disk from ISO file.
Nowadays many computer manufacturers don’t include an optical media (disk) reader on their products (especially on Laptops) so if you want to perform a clean installation of Windows 8 or to troubleshoot your computer problems, you must have in hands a Windows 8 (or 8.1) USB bootable disk.