How do I terminate System Idle Process?
You cannot kill the
System Idle process. The real question is why would you want to?
System Idle is the process that runs when the computer has absolutely nothing better to do (in other words it is waiting for some other process to need more CPU resources).
What is the System Idle Process and why is it using most of the CPU?
I mean, really, a process that regularly takes up 99% of your CPU’s
time must be a bad thing, right?
Nope, not at all. Just the opposite, in this case.
The fact is that most computers can never really do nothing. When the
computer is on, the CPU’s running and it must do something – even if
that “something” is waiting for something real to do.
Think of it as your computer just twiddling its virtual thumbs,
waiting for something more important to do. The computer’s doing
something (virtual thumb twiddling), but we wouldn’t call that doing
That’s called being idle.
And the “System Idle Process” is the software that runs when the
computer has absolutely nothing better to do.
It effectively runs at the lowest possible priority so that if
anything, anything at all, comes along for the CPU to work on, it can.
When there’s nothing left to do, back to idle it goes.
So having the System Idle Process using 90% of your CPU is a good
thing … it means that that 90% is readily availble should there be any
real work to do.
Source What is the System Idle Process and why is it using most of the CPU?