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ntoskrnl.exe constant cpu usage

Go to solution Solved by lukasturbo,

Found the problem. It was the HDD caddy. The diagnostic pin was connected to ground when it shouldn't be connected to anything. 

Here's the solution I found: http://forum.notebookreview.com/threads/hp-elitebook-8560p-wont-shutdown.655065/

I recently installed an SSD (Samsung 850 PRO 256G) (I placed the HDD into the DVD slot) into my laptop and after I reinstalled Windows the system process (ntoskrnl) is contantly using my cpu. The first logical processor is always almost at 100% usage and games with poor multicore support (Team Fortress 2) lose a lot of frames (I get a 30-40 fps boost the I change the affinity to disable the first core).

Specs:

OS Name    Microsoft Windows 10 Pro
Version    10.0.14393 Build 14393
System Manufacturer    ASUSTeK COMPUTER INC.
System Model    N550JK
System Type    x64-based PC
Processor    Intel(R) Core(TM) i7-4710HQ CPU @ 2.50GHz, 2501 Mhz, 4 Core(s), 8 Logical Processor(s)
BIOS Version/Date    American Megatrends Inc. N550JK.207, 2014-08-11
Windows Directory    C:\Windows
System Directory    C:\Windows\system32
Boot Device    \Device\HarddiskVolume2
Installed Physical Memory (RAM)    16,0 GB
Total Physical Memory    15,9 GB
Available Physical Memory    12,9 GB
Total Virtual Memory    18,8 GB
Available Virtual Memory    15,8 GB
Page File Space    2,88 GB
Page File    C:\pagefile.sys
GPU Nvidia GTX 850M 4GB

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******If you paste in text into your post, please click the "remove formatting" button for night theme users.******

CPU- Intel 6700k OC to 4.69 Ghz GPU- NVidia Geforce GTX 970 (MSI) RAM- 16gb DDR4 2400 SSD-2x500gb samsung 850 EVO(SATA) Raid 0 HDD- 2tb Seagate Case- H440 Red w/ custom lighting Motherboard - MSI Z170 Gaming A OS- Windows 10 Mouse- Razer Naga Epic Chroma, Final Mouse 2016 turney proKeyboard- Corsair k70 Cherry MX brown

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18 minutes ago, bgibbz said:

It's definitely not malware, cause it's a fresh install

I'm not sure about the drivers, but it's been using the cpu since the install. No specific drivers were installed (although Windows installed some drivers itself)

And I tried disabling notifications and it didn't help.

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26 minutes ago, lukasturbo said:

It's definitely not malware, cause it's a fresh install

I'm not sure about the drivers, but it's been using the cpu since the install. No specific drivers were installed (although Windows installed some drivers itself)

And I tried disabling notifications and it didn't help.

If you did not install drivers, that is your issue. You need to go through your motherboards website, install all drivers, and go to the graphics cards website and install drivers. Any additional pcie devices will also require drivers. 

 

Install drivers in this order-

http://www.dell.com/support/article/us/en/04/SLN148687

******If you paste in text into your post, please click the "remove formatting" button for night theme users.******

CPU- Intel 6700k OC to 4.69 Ghz GPU- NVidia Geforce GTX 970 (MSI) RAM- 16gb DDR4 2400 SSD-2x500gb samsung 850 EVO(SATA) Raid 0 HDD- 2tb Seagate Case- H440 Red w/ custom lighting Motherboard - MSI Z170 Gaming A OS- Windows 10 Mouse- Razer Naga Epic Chroma, Final Mouse 2016 turney proKeyboard- Corsair k70 Cherry MX brown

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5 minutes ago, bgibbz said:

If you did not install drivers, that is your issue. You need to go through your motherboards website, install all drivers, and go to the graphics cards website and install drivers. Any additional pcie devices will also require drivers. 

 

Install drivers in this order-

http://www.dell.com/support/article/us/en/04/SLN148687

I installed some of the drivers that I need. I just meant that it's been using the CPU before I installed the drivers

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2 minutes ago, lukasturbo said:

I installed some of the drivers that I need. I just meant that it's been using the CPU before I installed the drivers

I know. Missing driver could easily be the cause. I would recommend clean installing again and reinstalling drivers straight away. The system will not function correctly without ALL drivers installed correctly right away. 

******If you paste in text into your post, please click the "remove formatting" button for night theme users.******

CPU- Intel 6700k OC to 4.69 Ghz GPU- NVidia Geforce GTX 970 (MSI) RAM- 16gb DDR4 2400 SSD-2x500gb samsung 850 EVO(SATA) Raid 0 HDD- 2tb Seagate Case- H440 Red w/ custom lighting Motherboard - MSI Z170 Gaming A OS- Windows 10 Mouse- Razer Naga Epic Chroma, Final Mouse 2016 turney proKeyboard- Corsair k70 Cherry MX brown

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17 minutes ago, bgibbz said:

I know. Missing driver could easily be the cause. I would recommend clean installing again and reinstalling drivers straight away. The system will not function correctly without ALL drivers installed correctly right away. 

Installed the drivers. Still etting the same problem

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2 hours ago, lukasturbo said:

Installed the drivers. Still etting the same problem

Did you clean install windows? Drivers need to be installed right away or else they may interfere with other programs. 

******If you paste in text into your post, please click the "remove formatting" button for night theme users.******

CPU- Intel 6700k OC to 4.69 Ghz GPU- NVidia Geforce GTX 970 (MSI) RAM- 16gb DDR4 2400 SSD-2x500gb samsung 850 EVO(SATA) Raid 0 HDD- 2tb Seagate Case- H440 Red w/ custom lighting Motherboard - MSI Z170 Gaming A OS- Windows 10 Mouse- Razer Naga Epic Chroma, Final Mouse 2016 turney proKeyboard- Corsair k70 Cherry MX brown

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12 hours ago, bgibbz said:

Did you clean install windows? Drivers need to be installed right away or else they may interfere with other programs. 

I tried removing my HDD and now the CPU usage is normal. How can a secondary HDD cause the problem?

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Found the problem. It was the HDD caddy. The diagnostic pin was connected to ground when it shouldn't be connected to anything. 

Here's the solution I found: http://forum.notebookreview.com/threads/hp-elitebook-8560p-wont-shutdown.655065/

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