To begin with, it's definitely not easy to install SteamOS in VirtualBox. Valve clearly didn't intend for you to do this; you can't just mount an ISO and install it, like a normal Linux distro.

How to Install Windows XP in Microsoft Virtual PC. Virtualization programs such as Microsoft Virtual PC can help your business computers run older programs that require Windows XP. You can use ...

Jack Wallen shows you how to install the latest major release of the VirtualBox virtual machine manager.

Do you want Oracle VirtualBox 4.1? Do you have five minutes? If you said, 'Yes' to both questions, then this tutorial is for you.