Windows Vista

This operating system (OS) pioneered a new UI style called Windows Aero, implementing the glass opaque style on the desktop windows and deviating from the XP aesthetics. 

Windows Aero (Authentic, Energetic, Reflective and Open) standardized the visual guidelines such as using Segoe UI as the base font but also has a phrasing guide to help the user with the functionality of the OS.

Unlike Windows XP and 9x, the OS received mixed reviews due to factors such as costs, performance and hardware requirements, leading to Windows creating Windows 7. It addressed many of Vista's criticisms but retained the Aero visual style.

The Iconfactory designed the base icons for Windows Aero.