Welcome to the Community,
I'm not sure I understand what you are asking for. Are you trying to install ESXi on Windows 8? That won't work, because ESXi is an operating system which has to be installed on the hardware itself or - for testing purposes - in a virtual machine (e.g in VMware Workstation).
André
Note: Discussion moved from VI: VMware ESXi™ 3.5 to VMware ESXi 5