According to producer lobit.com the freeware Game Booster is said to optimize Windows so that games are playable with higher FPS rates.
Game Booster (4)
The software Game Booster is for free, has a size of 700 KiByte only and runs under Windows XP, Vista and Windows 7. After starting, Game Booster shows all active and inactive services of the system. With a click on "Switch to Gaming Mode!” all selected services will be closed. Game Booster shows active plug-ins such as anti-virus software in an extra window. Those applications can be closed down as well, which will offer more memory space. As soon as you click on "Back to Normal Mode” all closed services and applications will be started again.
The download of the final version 1.1 can be found on our servers. No changelog has been published so far.