Create A Bootable USB Flash Drive
Insert a USB flash drive into a running computer.
Open a Command Prompt window as an administrator.
Type “diskpart” Command
In the new command line window Type “list disk” Command and displays all the disks on the computer. Note down the USB Drive letter.
At the command prompt, Type “select disk 1“ and then click ENTER.
To create a new primary partition on the USB Drive Type “create partition primary” command and then ENTER.
At the command prompt, Type “select partition 1“and then click ENTER.
To format the partition, Type “format fs=NTFS quick” and then click ENTER.
Type “active” command and then click ENTER.
Type “exit” command and then click ENTER.

All window data file copy to a USB Flash drive then creates a bootable USB automatically when you run all commands before copying the windows file data system to USB Drive.

NOTE: When selecting partition USB Drive letter must be selected.