Install ESXi in a VMware Workstation virtual machine
When you don't have hardware that supports running ESXi and you want to setup this OS for testing or educational purposes then installing it in a VMware Workstation virtual machine allows you to run the OS on generic hardware. This article explains how to do this. It is based on VMware Workstation version 10 and ESXi version 5.5. Doing this is also know as running a nested hypervisor because it runs on another virtualization technology.