Windows 10 Why does disabling HDD timeout allegedly solve high CPU usage on "NT Kernel & System"?

[WinFreak]

I never had the high Kernel & System CPU usage, but I saw this issue on a friend's computer.

The process with PID 4 had a high CPU usage. But that issue solved itself.

However, how is disabling HDD timeout (spin down after ** minutes) meant to solve the CPU usage issue? How is it related?

 

[Neemobeer]

You'd have to evaluate the threads on the system process, determine which is utilizing the CPU and from there determine what the thread is doing.