Windows XP Professional with SP3 - Installation in Virtualbox

Since XP lacks the Desktop Window Manager (DWM) required for true Aero transparency, these versions use third-party "skinning" engines (like WindowBlinds or specialized msstyles) and sidebar gadgets to replicate the glass-like look of newer Windows versions.

To allow installation on newer hardware that XP didn't originally support.

Official versions of Windows XP do not natively include the Aero interface, which was introduced with Windows Vista in 2007.