System Idle Process Cpu Usage. It may be happening because of some particular application is consuming a huge System Idle Process runs on your CPU thread when no other task is running. If your PC is slow down, you can try the methods in this post.
If your computer has a multi-core processor (e.g., a six-core or eight-core), you may see a high System Idle Process percent when few or no software programs are running on your computer. System Idle Process CPU usage stands for the percentage of CPU that's available. This should mean nothing is using it, yet the high CPU usage remains.
Click on More details, if present, and then on the Details tab.
All of the system's major components, like the graphics card and RAM, rely on the CPU's instructions.
If your PC runs normally, just leave it. System Idle Process CPU usage stands for the percentage of CPU that's available. Contents: What is System Idle Process in Task Manager?