The guest operating system and its applications do not really know about the 'Virtual Machine', instead they 'think' they are running on a real machine, due to the powerful device emulation provided by VMLite Workstation. For example, you can simultaneously run Windows XP on a PC that is already running Windows 7. VMLite Workstation is a virtualization component, that allows you to run more than one operating system (OS) at the same time on a single physical computer.