Windows Vista only: System tweaking utility Vista Services Optimizer creates multiple profiles for easily toggling system tuning tweaks—useful for tweaking the last bit of memory out of your system without breaking everything. The application works similarly to most tweaking utilities like previously mentioned Ultimate Windows Tweaker—with options to tweak hidden Windows settings and disable unnecessary components, but the interesting feature is the ability to create profiles for disabling or enabling the tuning tweaks. The application could be useful for disabling all unnecessary features before running a video game or other resource-intensive application, and re-enabling them when you are done to prevent breaking other software. Vista Services Optimizer is free and open source, works only on Windows Vista. Just remember during your never-ending quest for speed, be sure to avoid common Windows performance tweaking myths.