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I have a problem with Windows 10 that I have not been able to solve after countless of hours that I've spent searching for the solution. I have found some strange things so far that might help to find the solution though.

My computer is self-built. It has the following parts:

  • Asus Z-97P Motherboard
  • Intel Core i5-4670K
  • Nvidia GTX 970
  • 4x4gb Kingston HyperX Ram
  • 240 gb Kingston SSD + 2 Hard drives
  • 620 Watt Power Supply

So the problem is that in Windows 10 I have almost 100% while idle on desktop. The culprit according to resource monitor is System and System interrupts. What I have tried to get rid of the problem:

  • BIOS update
  • Install all drivers from Asus
  • Windows update
  • Remove all USB hardware
  • Remove extra hard drives
  • Reinstall Clean Windows 10
  • Disable Windows Update with Gpedit

Nothing seems to work. Sometimes my computer starts and behaves normally, CPU usage 0-5 % idle. Usually not. But here is the interesting part: If my CPU usage is at 100% idle, I can make a temporary fix by putting my computer to SLEEP mode and turn it on again. Then the CPU usage drops back to normal.

Please if you have any suggestions, I am willing to try them. Also if I need to provide any additional information I'll be happy to do so.

Edit: Disabling Diagnostic Policy Service from Services.msc brought CPU Usage down a bit.

jte
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1 Answers1

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From this stack information; stack Specifically:

|ACPI.sys!OSNotifyDeviceWake
|----ACPI.sys!ACPIWakeRemoveDevicesAndUpdate

It does feel like an issue with the power management function of a device.

Maybe first see if there are any devices in Device Manager you can do without as a test. If the issue is still present with a number of devices disabled, focus on the power saving configuration of the remaining devices.

Also see: High CPU usage by "System" and "System interrupts" (caused by ACPI.sys) for information as posted by the SuperUser legend MagicAndre1981.

HelpingHand
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