This one, http://www.iobit.com/gamebooster.html
Ripped from the site:
Enjoy the best gaming experience ever
Designed to help optimize your PC for smoother, more responsive game play in the latest PC games with the touch of a button, Game Booster helps achieve the performance edge previously only available to highly technical enthusiasts.
It works by defragmenting game directories, temporarily shutting down background processes, cleaning RAM, and intensifying processor performance. That means you can keep all the features of operating systems ready for when you need them, but turn them off when you are ready to get down to serious business – gaming.
Works compatible with PunkBuster, Cheating-Death, VAC, and any other anti-cheat software, Game Booster makes it simpler to enjoy the latest games and take your experience to a new level. All systems go!
I had doubts that it will expose you to certain vulnerabilities.