This video step by step walkthough takes you though the installation process of Kali Linux 2016.1(Formally Backtrack) on Hyper-V in Windows 10.
You can install Hyper-V on Windows 10 for free and Kali Linux is also a free open source operating system.
Kali Linux is designed for penetration testing and comes prepackaged with heaps of security testing tools.
This installation is using Kali 2016.1 which is the first of the rolling releases of the Kali penetration testing OS.