To use a USB flash drive to install Windows 8, you must first create a USB boot disk.
There are several tools for creating a USB boot disk. Today we recommend a free tool: Windows 8 USB Installer Maker.
Prepare the environment:
1. For the ISO image of the Windows 8 installation disk, you can download the latest version 8.1: Windows 7 or later (supports 32-bit and 64-bit). First download: USB flash drive installation win8production tool. Zip plug in your USB flash drive double-click to open the selected USB drive letter and windows8 ISO Click create to start, there will be no response on the way, it is normal.
Be patient
Production completed
Next, you can start and install it with a USB flash drive. Remember to set the boot sequence in BIOS!
The installation process is no longer detailed.
PS: this tool is based on the principles of a technical Article officially published by Microsoft, saving you from the troubles of various commands and settings.