Windows 10: [ntoskrnl.exe] CPU very high only when connected to the mains?

Discus and support [ntoskrnl.exe] CPU very high only when connected to the mains? in Windows 10 Support to solve the problem; Hi friends, pls help me figure this out? I did a fresh Win10 Home install on a new 1TB SSD. And my Laptop (Fujitsu FMVA53SRG, Win 10 Home... Discussion in 'Windows 10 Support' started by saresu, Nov 13, 2020.

  1. saresu Win User

    [ntoskrnl.exe] CPU very high only when connected to the mains?


    Hi friends, pls help me figure this out?

    I did a fresh Win10 Home install on a new 1TB SSD.

    And my Laptop (Fujitsu FMVA53SRG, Win 10 Home 10.0.19042) when CONNECTED TO THE MAINS shows ntoskrnl taking around 16% CPU and System Interrupts around 3% CPU with the fan spinning a bit loud.
    And ON BATTERY: ntoskrnl hovers around 4% and System Interrupts around 0.6% CPU and the fan slows down considerably.

    Everything's updated from Windows Update. All devices look good at the Device Manager. So I dont know where else to look. I've attached a msconfig.32 text file.

    Tweaks I did so far:
    Disabled services following Black Viper's "Tweaked" for DESKTOP and "Safe" for LAPTOP configurations;
    Disabled Windows Defender with Autoruns and some other "tweaks" with Policy Plus (thank you guys *Smile)

    Thank you in advance. *Smile

    :)
     
    saresu, Nov 13, 2020
    #1

  2. BSOD ntoskrnl..exe+1b35e0

    Hi, KirbyBakken

    My name is Maritza and I am an Independent Advisor. I would be happy to help you today.

    Check this link, I hope it helps

    https://www.thewindowsclub.com/ntoskrnl-exe-hig...

    Note: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised
    on the site before you decide to download and install it.

    Let us know if these steps help you to resolve the issue.
     
    MaritzaCapiro, Nov 13, 2020
    #2
  3. StPeteFL Win User
    Fix ntoskrnl high cpu usage for Windows 10 Pro?

    In mid - late December 2019 I noticed a lag in starting applications after booting (or powering up) my Windows 10 desktop. Outlook, Word, Excel, and others has a noticeable delay in starting. Once I noticed this behavior I started task manager and noticed
    a process named 'System' running consistently at a CPU rate of 15 - 17%. No matter how long the system was running, even with no active applications started or idle, the CPU rate never changed for this 'System' process. I've watched task manager before and
    have never had a process 'System' running at this rate. Normally when present this 'System' process runs at around 0.2 - 0.4% CPU.

    I selected 'System' looked at properties and it is the 'ntoskrnl' process. Next, I went to Micorosoft technet and forums looking for information related to this issue. And, of course, I found a plethora of questions, discussions, etc., all involving ntoskrnl
    and high cpu utilization, some dating back to 2016. I followed the ones posting in 2019 and tried all the suggestions for fixing this issue. Uninstall this, remove that, kill items in startup, perform a clean boot, check registry and change this, etc., etc.,
    etc..

    Non of these worked. I returned the system to the current configuration I've been running for 3 years. Here is what I noticed: If I rebooted (selected 'Restart'), the system rebooted and the 'System' process aka 'ntoskrnl' process was running at 0.2 - 0.4
    CPU rate, after about 20 -30 seconds. If I 'shut down' the system to a power off state and then start the system up there is always the 'ntoskrnl' running at the high CPU rate - forever. Perform a reboot (even an immediate reboot) then 'ntoskrnl' is running
    at the normal 0.2 - 0.4% CPU rate. And there is no lag in starting Outlook or Word or Excel, or etc. The system is back to running normal performance only after a reboot.

    So why is ntoskrnl having the aberrant behavior? Please help by looking into this. This issue with ntoskrnl keeps resurfacing and Microsoft has not fixed this.

    Here is my system information- Windows 10 Pro 64 bit, 16GB RAM, Intel i7-6700T CPU, 512GB SSD, all updates current as of Jan 3 2020

    Two suspicious updates:

    1) December 10, 2019-KB4533002 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 10 Version 1903 and Windows Server 1903 RTM and Windows 10, version 1909 and Windows Server, version 1909

    2) December 10, 2019—KB4530684 (OS Builds 18362.535 and 18363.535)

    The ntoskrnl properties lists the following: Created Wednesday Dec 11, 2019, Location C:\Windows\System32 - this incredibly suspicious because this is the same time frame that I noticed the system behaving differently. AND it certainly suggests that one
    of these updates has corrupted the WIndows 10 Pro performance in the ntoskrnl service.
     
    StPeteFL, Nov 13, 2020
    #3
  4. niconpl Win User

    [ntoskrnl.exe] CPU very high only when connected to the mains?

    ntoskrnl High CPU usage


    Hello Guys , im strugling for few days with this and no luck.

    ntoskrnl is constantly using 1 of cores as shown below.



    [ntoskrnl.exe] CPU very high only when connected to the mains? [​IMG]


    Process name is System and compressed memory, and is pointing to ntoskrnl



    [ntoskrnl.exe] CPU very high only when connected to the mains? [​IMG]


    Im using laptop Samsung np350v5c-s0dpl
    i7 3630qm
    8gm ram
    Intel Hd graphics 4000
    Amd Radeon 7600M
    -----------------------------------

    What's more interesting , this started after i swaped my DVD drive with HDD.. when i run only with SSD in mail slot it;s normal.
    Already try clean install but still the same.
    I can share WPT on PM
     
    niconpl, Nov 13, 2020
    #4
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[ntoskrnl.exe] CPU very high only when connected to the mains?

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