Windows 10: high cpu usage by System process (ntoskrnl.exe thread)

I installed Windows 10 2004 last week and it's been almost great overall except for this problem, sometimes (1 in 3 boot operations) when I boot up my laptop, usually from Hibernation, the System process begins taking 40%-50% of my CPU and I would need to restart my laptop for it to go back to normal, I tried to see what exactly is using the CPU using a third-party process viewer app and I took a screenshot of the System process properties, and found a list of threads called "ntoskrnl.exe!KeRaiseIrqlToDpcLevel+0x870" that are taking up so much CPU. What does it mean and how can fix it please?
Thank you.



:)

 

system process high cpu usage

Hello,

To fix high CPU usage issue, please refer these steps:

Try to identify the process creating this issue.

Download Process Explorer from Microsoft:

Process Explorer - Windows Sysinternals

Run the tool then select the system process, right-click and select Properties.

Switch to the Threads tab. This will show which file is using the excessive CPU usage, from which you can then attempt to diagnose it.

Also refer: [FIX] Windows 10 High CPU Usage Problem

Let us know if this helps!

Note: Included link in this reply refers to blog post by a trusted Microsoft MVP.

 

High CPU and disk usage by System (ntoskrnl.exe!RtlAvlRemoveNode+0x7ba0)

Windows 10 Pro 64-bit, version 1803

I'm having performance issues due to high CPU and/or high disk usage by the "System" process. It doesn't happen continually, but many times a day (not sure about the frequency, but could even be a few times per hour), and can last for a few minutes, in which
my PC can take a few seconds to respond to commands, like typing text or mouse clicks (in different programs).

I have checked with Process Explorer while this happens, and in the System process threads I see the high CPU usage being caused by threads with the start address "ntoskrnl.exe!RtlAvlRemoveNode+0x7ba0". I don't know if the high disk usage has the same cause,
but I assume it does. Any idea about what could be the issue, or how I could get more information to solve it?

 

"System" process with high CPU usage

I have exactly the same issue (high CPU usage) on a brand new HP ProBook 440 G5 (i7-8550U, pre-installed Win 10 Pro).

I am pretty sure that there is a problem with audio drivers when the computer wakes up from a sleep mode. I first observed that process flow.exe (audio bloatware provided by HP/Conexant) was consuming (after waking up) ~10–15 % CPU. Here's what I did:

• I have updated Windows to 1709, build 16229.251 and installed all updates --> Nothing has changed.
  
• I have updated BIOS to the latest version provided by HP. --> Nothing has changed.
• I have run Windows troubleshooting and HP Support Assistant checks --> No problems found, nothing has changed
• I have manually updated Conexant ISST Audio Drivers (via Device Manager -> Update drivers). Windows installed a newer version. -->
  CPU usage by flow.exe has disappeared, but process called System in thread ACPI.sys+0x21cb0 started consuming ~20 % CPU.
• I have uninstalled all Conexant software&drivers and manually installed generic High Definition Audio Device drivers provided by Microsoft (Driver Date: 21.02.2018). --> ACPI.sys+0x21cb0 still consumes ~20 % CPU.

Same issues are discussed in these threads on HP site:

• https://h30434.www3.hp.com/t5/Business-Notebooks/ProBook-450-with-high-CPU-usage/td-p/6520063
  
• https://h30434.www3.hp.com/t5/Noteb...-Fan-issue/m-p/6567212/highlight/true#M442639

The result is I cannot use sleep mode (as advised by this post:
https://h30434.www3.hp.com/t5/Business-Notebooks/ProBook-450-with-high-CPU-usage/m-p/6611446/highlight/true#M149605).