You do realize that game booster is a placebo, right? The only thing that can speed up your system is to close/freeze programs that are not core parts of windows.
Game booster freezes everything, safe or not. If anything it slows down your computer due to core components being frozen.
I disagree with you. Game Booster is proven to be the best "temporary" optimizing program out there, and the results and reviews can be found around forums like Overclock.net , 3Dguru etc.
Game Booster Temporarily Disable non critical processes / Services which are running in your background. Little that people realize, they are tons of them. Game Booster also allows advanced user to chose which to disable in gaming mode
For me, i dont use game booster. I manually tweaked my system for every juice of performance. I permanently disable every unwanted service like "windows indexing service, system recovery etc".
Usually, ill get 50+ processes running on default. After tweaking, i get like 39. Every processes uses memory and resources, the more the tweak, the lesser they use, the more performance you gain.