Installing Kali Linux on your computer is an easy process. First you’ll need compatible computer hardware. Kali is supported on i386, amd64, and ARM (both armel and armhf) platforms. The hardware requirements are minimal as listed below, though better hardware will naturally provide better performance. The i386 images have a default PAE kernel, so you can run them on systems with over 4GB of RAM. Download Kali Linux and either burn the ISO to DVD, or prepare a USB stick with Kali Linux Live as the installation medium. If you do not have a DVD drive or USB port on your computer, check out the Kali Linux Network Install.
To read the full document, check our Installing Kali Linux to Hard Drive article.
If you have any issues with this procedure, please post them in this thread.