well i herd about it and wanted to try it , its simple and easy and doesnt require a code to activate it .

works for me try it urself if not then stick with gamebooster

http://www.gzero.com/gboost/home.html

Yes, its a very nice program, when you are lagging. It closes all of the unneccessary actions on your computer and focuses only on improving the performance. I used it before when i had shitty PC and it really gave me ~ 20 fps extra.