Windows 10: High System (ACPI.sys) Usage

Recently I noticed that system (specifically ACPI.sys) was using around 25% of my CPU at idle, usually causing 1 core to stay at 100% usage. Thinking something was wrong I searched around the internet for a while looking for a solution but none seemed to work. Interestingly, when I disconnect from the internet system CPU usage drops to <5%.


I've run Malwarebytes, Avast and Windows Defender and none found any malware or other issues.

Running DISM /Online /Cleanup-Image /ScanHealth in the command prompt returned no corruption.

I have checked for updated drivers on devices that other users have reported fixed this issue, these were all up to date.


Any ideas for other possible solutions that I can try? I am happy to provide more details if necessary.


System Info:

Windows 10 Pro 1903

Version 10.0.18362


CPU i5-6600k



This is a screenshot detailing the high system usage at idle.





This is a screenshot showing idle usage with no internet connection.



:)

 

System and compressed memory high disk usage

Hi Robert,

As you are facing issues with high system and compressed memory on your device we will help you with this issue.

Provide us additional information to assist you better with this issue:

• What is the make and model of your device?
• What is the complete error message with respect to the memory when you are trying to access games?

This issue might have occurred due to applications or services running at the startup on the computer. Bad sectors on the hard drive or outdated and incompatible drivers might also cause such issues.

I suggest you to refer to the below post check if your issue matches with the same.

If so, I recommend you to try the troubleshooting steps suggested by Amarjeet Paul
and check if it helps.

System and compressed memory high disk usage during file
copy

Hope it helps. Get back to us with an updated status of this issue for further assistance.

 

System and compressed memory high disk usage during file copy

Thank you Amarjeet_Paul.

I spent many more hours than I had hoped this past week reading and trying others' suggestions from this community on how to reduce high RAM usage due to ntoskrnl.exe. The "System and compressed memory" process remained the top consumer of RAM, using 500-900MB,
among all other processes running. I deemed it to be the likely culprit in making my computer use frustratingly sluggish. After completing your
third step, steps 1. & 2. provided no improvement in my case, the "System and compressed memory" process RAM usage has plummeted from the top of the Task Manager Process list to the bottom, running at a remarkable 0.1MB! That's a whole lot less than
1% of the targeted process' gluttony. You're hired! Ps. I'll be keeping an eye on the process' use as I get back to normal operations, and be back if it floats to high in the list. Or if the registry fix you suggested has compromised use in any way. Please
explain in simple terms what the insertion of your registry modification is doing.

Thanks again.

Geoff

 

System and Compressed Memory High Disk Usage

Hi Yousef,

As you are facing issues with high system memory usage on your PC, we will help you with this issue.

I understand the inconvenience you are facing with CPU usage by the processes on your device. Do not worry we will help you with this issue.

These issues might occur due to applications or services running at the startup on the computer. Bad sectors on the hard drive or outdated and incompatible drivers might also cause such issues.

I suggest you to refer to the below post check if your issue matches with the same.

If so, I recommend you to try the troubleshooting steps suggested by Amarjeet Paul
and check if it helps.

System and compressed memory high disk usage during file
copy

Hope it helps. Get back to us with an updated status of this issue for further assistance.

Thank you.