What is Virtualbox? Virtualbox is a hardware emulation virtualization software(say that 10x faster), by mapping the host computer’s hardware resources directly to the virtual machine’s resources, it creates a virtual copy of your computer. With this virtual machine you can install and run different operating system within your host computer.
I'm currently running Virtualbox on an Windows XP (XP being the host) and gOS Linux as guest. Everything works out of the box. :)