Windows 10 keeps showing 100% of CPU usage no matter what

cpu usageperformancetask-managerwindowswindows 10

I'm having a curious issue in my Windows 10 Pro 64: the task manager keeps telling I'm using 100% of CPU no mather what: it's just there, fixed, doens't matter which are the consumptions of the listed processes. I tried to find some solutions on the web (such as this link), but I couldn't find anything suitable and applicable for my specific situation (i.e. my Windows 10 version).

How could I possibly solve this problem? I quite don't see my PC being slower because of this, but still is clearly a bug since there is no way my PC would be constantly using 100% of CPU without droping not even 0.1% at least once.

Any help appreciated.


Funny: I noticed that by using the "Users" tab in Task Manager, I can easily notice the difference between the "real" PC consumption and the value W10 is giving me:

Difference in use

(Of course, this assuming the total use of the CPU's processing isn't supposed to be higher then the sum of what is used by each user)

Now a relevant observation: going to the "Details" tab in Task Manager, I can verify that most of the CPU usage is really being consumed by the "System Idle Time" as you may see in the image below:

Idle Time consuming most of the CPU process

And well this is what I would expect! So it seems there is no process or service actually consuming high CPU, it's the Task Manager itself that is considering Idle Time as a normal process and summing it to the other "real" process and then showing the "100%" value.

Best Answer

  • The worst part about this is it prevents the CPU from throttling down when there's no activity. Here is how I recommend solving it:

    1. Open control panel
    2. Select System and Security
    3. Select Power Options
    4. Select Change Plan Settings (the active one if you have more than one)
    5. Reset to defaults.

    The CPU utilization and the clock speed should immediately start dropping.