You need the following:
Intel Core 2 Duo processor with Intel Virtualization Technology
Intel 965GM chipset
Intel 82566DM GbE LAN/
Intel AMT Firmware
Intel VT/Intel AMT capable BIOS
You can download the latest Bios and firmware from the motherboard site. For eg; if you have Intel Desktop Board DQ965GF, you can download bios and drivers from http://support.intel.com/support/motherboards/desktop/dq965gf/. For checking the current version of your firmware, select ctrl+P option while booting up and that will take you to the Intel AMT configuration menu.