A free professional tool to Tweak and Optimize Windows Vista! It has some great features and over 50 tweaks that you can individually apply to tweak and optimize your Windows Vista Without having the knowledge of registry and system settings.
Features:

Easy installation and Tweaking within seconds
Costumize Vista´s user interface to your own feel and touch
Tweak the performance of your Vista system
Tweak the performance and settings of IE explorer
Costumize Vista´s Security to a finer degree
Costumize and Enable Hidden features in Windows Vista
Change the way vista functions
Easy to Restore functions back they way they where