>http://www.thepcspy.com/articles/other/what_slows_windows_down/3

Interesting article, but I question it's accuracy and there are a lot of other variables that were not taken into consideration. For example if you're running Azureus 2.5.0.0 (+ Java Runtime), it would depend upon what you've setup to download and how much you're seeding, right? Plus this guy suggests that not installing anti-virus software will help...ummmmm... kinda bad advice really.