Windows 7 only: If you've been itching to use the new XP Mode feature in Windows 7, but you aren't too keen on using Virtual PC or just prefer VirtualBox, here's how to use XP Mode in VirtualBox.

VirtualBox is a general-purpose full virtualizer for x86 hardware. Targeted at server, desktop and embedded use, it is a professional-quality virtualization solution that is also Open Source Software.

VirtualBox is flexible enough to handle many types of 32-bit and 64-bit configurations. If you need to run a 32-bit version of XP in a 64-bit host, you can do that without any problems.

The Windows 8 beta is here. This is what you need to know to run it in a virtual machine in VirtualBox.