Create a Bootable UEFI USB Flash Drive (Windows 8 / 8.1)

UEFI stands for “Unified Extensible Firmware Interface”. The UEFI specification defines a new model for the interface between personal-computer operating systems and platform firmware.

1. Insert the USB flash drive (for Windows 8.1 64bit use a 8GB device)
2. Open an administrative command window (Windows Key + X > Command Prompt (Admin))
3. Type the following commands:-

> diskpart
> list disk (identify disk # number representing the USB device)
> select disk #
> clean
> create partition primary
> format fs=fat32 quick
> active
> assign
> exit

4. Open File Explorer, navigate to your Windows ISO file, right click and select Mount
5. Select all files (Ctrl + A), right click and select Send to and then select Removable Disk

That’s it your good to go… If your system supports UEFI boot mode, then attach your USB flash drive, restart and drill through the Windows setup…