System Idle Process

I noticed today that my computer was a little sluggish. I opened the task bar to find that my "System Idle Process" CPU usage was running at 98-99. Is this normal? What could be causing this and how do I correct it?

It's perfectly normal if nothing else is running. It's not a real process, it shows the idle (unused) CPU time.

It's perfectly normal if nothing else is running. It's not a real process, it shows the idle (unused) CPU time.

That's a relief to know-- thanks.