Why would you want to. I tried it once, and this thing ran like crap.
Sorry to ruin the "quick fix", but that is a fact. I'ved tried
all that stuff, Alacricty, Black Viper. IMOH, Please do not mess with your system.
This is just a man telling you that most of the stuff on your computer is there for a reason.
I ain't too smart, but I know which way the sun rises.
Coogan 
The majority of stuff is there "for a reason" but the question is "what's the reason"? For instance, I have an iPhone and had to load iTunes to support it. Do you really think you need iTunes to continue to run in the background, taking up system resources and using some of your connection bandwidth downloading iPhone/iTunes software updates while you're trying to gun someone's brains out?
Some of the stuff that will continue to run in the background on my system include Kaspersky Internet Security (looks like five or six processes), Memeo Backup (three processes), Power Alert UPS (two process), iTunes (four processes), InCD, DVD Launcher, Search Indexer, plus several more arcane processes totaling more than 40. Many of these not only take up resources but will periodically go out on the net checking for updates and, of course, there are the adware/spyware/malware programs that most people end up with that they're not even aware of.
When I shut these down and just run the essentials I've got less than half that running. I found Alacrity's recommendations (i.e., telling you which processes are necessary and which are not) is a good guide for what you can do and it does make a difference. There are lots of processes though that Alacrity doesn't know about so you can do a quick google search to find out what the process is supposed to do before you decide to shut it down or not. Even a conservative approach shutting down only that stuff that you know for sure you don't want can help.
