Not to worry, we have a detailed yet simple guide to help you install and test-drive Windows 8 on your existing PC using a free to use virtualization software called VirtualBox.

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.

While you're at it, check out Adam's guide to trimming down Windows to the bare essentials for a real speedy virtual installation ISO.

Kubuntu is an official, lightweight Ubuntu-based Linux distribution. If you want to try Kubuntu on VirtualBox in Windows 11/10, follow this guide.

If you want install Oracle Linux on Oracle VirtualBox, you can follow this guide to download the VM tool, ISO file, and create the VM.

UPDATE: This guide is now out of date. If you want to run OS X inside VirtualBox on Windows, check out our new guide here.