It is absolutely normal for the System Idle Process to show a high CPU usage, typically ranging from 70% to 90%, in the Task Manager when you are not running any programs or only a few. In fact, this is a good thing and indicates that your processor is not heavily burdened and is idling, waiting for tasks to be executed.
The System Idle Process is a representation of the percentage of time that the CPU is not being utilized by any active processes or threads. It essentially shows how much idle capacity your CPU has at any given moment. When the CPU is idle, it is not actively processing any data or executing any tasks, so the System Idle Process takes up the majority of the CPU usage.
In simpler terms, if you imagine your CPU as a worker, a high percentage of System Idle Process means that the worker is not currently occupied with any tasks and has free time on their hands. This is perfectly normal and nothing to be concerned about.
It is important to note that the System Idle Process is not a real process running on your computer, but rather a representation of the available CPU capacity. It is not consuming any system resources and does not impact the performance or speed of your computer in any negative way.
If you were to start running resource-intensive programs or tasks, you would see the CPU usage shift from the System Idle Process to those active processes. This is when the CPU would be actively engaged in executing tasks and the System Idle Process would have a lower percentage.
So, to summarize, a high CPU usage shown by the System Idle Process in the Task Manager is completely normal and indicates that your processor is not currently occupied with any significant tasks. It is a sign that your CPU has plenty of available capacity and is ready to handle any workload you may throw at it.
I hope this explanation helps clarify any concerns you may have had about the high CPU usage of the System Idle Process. If you have any further questions, feel free to ask!