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.

VirtualBox runs on Windows machines, Macs, and Linux machines, so you’ll be able to install Windows 10 in just about any platform. Get it from here, download it, and install it.

How to Install Windows 8 on VirtualBox Note: This guide is written for Windows 8 Developer Preview and installed on a Dell Studio 1555 Laptop running Windows 7 64-bit version using VirtualBox 4.1. ...

Whatever ISO or disc you've supplied VirtualBox with will load just like it's on a machine for the first time, and you'll go through the same installation process as if you were loading Windows ...

Learn how to fix FATAL, No bootable medium found, System halted error in VirtualBox. It occurs if the ISO file is not attached to the virtual machine.

Oracle's Virtualbox is one of the most popular ways to create virtual machines, so here's how to take your first steps.

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.