This is a handy little program that closes EVERY unessasary (including explorer and your desktop wallpaper!)
service whenever you start it. Takes a little while to get set up (5-10 mins). It also has a ram optimizer it runs, moving all the necessary services it leaves running to the front of your ram then allows your game to fill up the remaining RAM.
IT original started as FSAutloader, but has been changed to work with any game.
http://alacritypc.kensalter.com/
If anyone has problems I'll be glad to help