Windows 10 System High CPU Usage ACPI.sys

Hello all,

Post upgrade to Windows 10 Pro I have been experiencing higher than usual system CPU usage (~10%), accompanied with system interrupts. I used process explorer (screenshot attached). It seems to be ACPI.sys.

All the drivers (that are available for Windows 10 ) are updated to their last versions, as well as the BIOS. Booted into safe mode - problem persists. SSD Firmware has been updated as well. I disabled non-critical devices one by one and the problem persists. 

Hardware:

Laptop: ASUS N550JV; CPU - i7 4700HQ; 16GB RAM; NVIDIA GT750M; Samsung EVO 840 120GB (System Partition); Samsung EVO 840 500GB (additional non-windows stuff installed). Realtek LAN; Qualcomm Atheros WLAN.

I can provide the trace file from xperf as well, but it shows the processes as Unknown.

Any help appreciated! Thank you in advance.


 

 

Question Info


Last updated September 25, 2018 Views 14,889 Applies to:

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Hi Georgi,

We appreciate you for being part of Windows 10.

I appreciate you for trying the troubleshooting steps to resolve the issue.

Acpi.sys is a Windows driver. A driver is a small software program that allows your computer to communicate with hardware or connected devices. This means that a driver has direct access to the internals of the operating system, hardware etc. The original acpi.sys is an important part of Windows and rarely causes problems. Acpi.sys is located in the C:\Windows\System32\drivers folder.

Note:Some malware disguises itself as acpi.sys, particularly when not located in the C:\Windows\System32\drivers folder. Therefore, you should check the acpi.sys process on your PC to see if it is a threat. We recommend to run the Microsoft safety scanner and to verify the security related issues.

The Microsoft Safety Scanner is a free downloadable security tool that provides on-demand scanning and helps remove viruses, spyware, and other malicious software. It works with your existing antivirus software.

Try to download the Microsoft Safety Scanner from the below link and check if it helps.

Microsoft safety scanner. 

http://www.microsoft.com/security/scanner/en-gb/default.aspx

Microsoft Safety Scanner Disclaimer:

Any data files that are infected may only be cleaned by deleting the file entirely, which means there is a potential for data loss.

Kindly let us know if you need any further assistance with Windows.

Thank you.

Thanks and regards.
T Kiran Kishore.
Forum Moderator OneDrive, Support Engineer.

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Hello Kiran,

Thank you for the answer. I used Microsoft Security Scanner (full-scan), as well as Malwarebytes and they could not find anything on my PC. Any further suggestions for troubleshooting? Could an old app from Windows 8.1 be causing this?

Thank you for your support.

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I have the same problem on my MacBook Pro Retina Late 2013 (11,2) with the same thread (ACPI.sys+0x1e7f0). It happens even on clean installed system with bootcamp drivers, official bootcamp page says nothing about Win 10 support though so I think drivers might cause this problem. Going into sleep mode and back fixes it but when I restart my computer it happens again.

Edit: In my opinion cause of this problem is Intel's driver for integrated graphics because when I delete it and reboot I don't have high cpu usage problem anymore but once I install it again usage goes back to 10-20%. P.S.: I have and had latest drivers for it.

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Hello Ilya,

Thank you for the contribution. I can't uninstall the Intel Graphics Drivers as the laptop recovers them during the restart My guess would be since the Laptop can't use the NVIDIA graphics on its own, but has to forward everything through the Intel Graphics. However it is possible the problem is the same. I guess I have to wait for Intel to release a newer version then.

Any suggestions how I could test that? Thanks in advance

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Hello Georgi,

I don't have external graphics but system recovers my driver too so I don't think that your laptop can't use nvidia graphics on it's own. However I can reboot and check task manager for cpu usage before recovering of this driver. By the way I tested driver from Intel's website too but problem still persists so I don't know what to do. I think you are right, we just to wait for update of this driver.

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Hello

i have the same issue on my Surface 3 Pro with Win 10 upgraded Version.

So how to fix that?

My fan is always running and running and burns down my battery.

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Hello everyone,

I think I know how to temporary fix this problem, at least this method helped me. You just have to enable fast boot in control panel and never reboot.  I hope it will resolve your problem.

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This is not a solution.

I have another similar issue:

Windows graph isolating for audio makes same problems: up 3% CPU all the time.

On some reboots it helps for a while. Then it come back.

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Please upload the Xperf ETL to onedrive or any file sharing service and put a link to it in your next post.

Can you tell us what switches you used in Xperf?

Cat herder
Windows Insider MVP
MVP-Windows and Devices for IT
http://www.zigzag3143.com/

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It helped me but I had problem with Intel's graphics driver, not audio one.

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