I stumbled across this on a forum for Rail Works, this tool will be essential if you play games or Sims...It's called Game Booster, and it's been verified safe.
Grab it here, first you will install it, then it will say there is a new version avalible....you will have two options, best to go for 3.5 Beta it has more features. How to use, run, and find the "start boost" button.....wait till it finishes and then run your desired sim/game
http://www.iobit.com/gamebooster.html