Sorry but I have to ask: In what way could the "System Idle Process" be bothering you. Are you having problems? Just need a little more info, please.
If you are talking about the fact that it runs at 80-100%, that's how it is supposed to work while no other processes are running.
If you feel like there may be something running you might want to run to detect and remove spyware.
It could also be the window's indexing sevice running which could be disabled.
Let us know.
brad
