how to make your usb bootable ?

how  to make your usb bootable ? 

 

1. insert usb in the computer

2. open start menu and open command promt in mode of administrator and then type 

    diskpart

3. In the new command line window that opens, to determine the USB flash drive number or drive letter, at the command prompt, type list disk, and then click ENTER. The list disk command displays all the disks on the computer. Note the drive number or drive letter of the USB flash drive.

 4.select the drive and then press enter

5.Then foramt your drive by typing clean

6.After following upper instruction type active and then press enter

7.After finishing type exit and then enter