You must not run any outside applications that take up a lot of processor...like computer games and whatnot. The object for a lot of people is to have an OS that uses the minimum amount of CPU so it doesn't slow down when they are using other applications. I don't know enough to really shave it down like Vendetta does but I do go in and routinely check all the apps and background programs and startup crap that they try to sneak in and shut them down.