Vista enables ClearType font smoothing by default, which causes an Orbiter framerate hit compared to XP. VistaBoost is a plug-in module for Orbiter that automatically disables font smoothing when Orbiter launches and restores font smoothing to its previous setting when Orbiter terminates. If you have a fast video card, VistaBoost can improve your Orbiter framerate under Vista by 60% or more.