I am having problem in making a Kali Linux Live usb bootable. I downloaded the Kali Linux ISO FILE from (https://www.kali.org/downloads/). I got a Win32 Disk Imager from (http://sourceforge.net/projects/win32diskimager/). After writing Kali Linux ISO file onto the usb with the Win32 Disk Imager, I tried to boot it up on my Windows 8.1 laptop (Dell Inspiron 15, 3000 series, 64 bit machine). However, my computer did not recognize my bootable usb and did not provide an usb boot option in the BIOS. Can anyone please suggest a solution to my problem?