Yes, it does, Game Booster is a great software for those who can't play the most demanding games.
Game Booster will not help you that much if you don't change the settings and the resolution to low.
Game Booster basically cancels the other programs, programs that you don't need while playing the game, so the computer can get ''lighter''.
It's designed to help you optimize your PC for smoother, more responsive game play in the latest PC games with the touch of a button.
When you download Game Booster, it comes with the defragmenter, and with a disk cleaner. If you really want a difference while playing, you should install both of those programs, and then you will se a massive improvment to your gameplay