How to Fix High CPU Usage Caused by System Interrupts

This article will show you How to Fix High CPU Usage Caused by System Interrupts. Is your computer suffering from high CPU usage? This is known as “system interrupts”, it shows you might be dealing with a hardware or driver issue.
This article will explain what system interrupts, how you can find and fix the primary cause of their high CPU usage in your PC. Fix system interrupts high cpu usage with easy steps.

What Is “System Interrupts”?

System interrupts appears as a Windows process in your Task Manager, though it’s not actually a process. It’s a kind of representative that reports the CPU usage of all interrupts that happen on a lower system level.
Fix High CPU Usage Caused by System Interrupts
The Interrupts can originate from hardware or software, as well as the processor itself.
An interrupt alerts the processor to a high-priority condition requiring the interruption of the current code the processor is executing. The processor responds by suspending its current activities, saving its state, and executing a function called an interrupt handler to deal with the event.
When the interrupt handler task is completed, the processor resumes the state at which it was interrupted.

The interrupts are a form of communication between software and hardware with the CPU. A good example is when an individual types on your keyboard, hardware and software concerned sends interrupts to the CPU to inform it about the task at hand and to trigger the necessary processing.
You can practically do this by moving your mouse and see what happens to the CPU usage of system interrupts to better understand the process.

Interrupts can signal to the CPU that an error occurred and this can cause the CPU usage of system interrupts to increase

How to Fix the High CPU Usage

1.    Reboot your Computer
This is the first fix that you should always try.

2.    Disable Sound Effects
Disable any sound effects available.
If using windows 7.
•    Right-click the speaker icon,

Speaker icon
•    Click Playback devices,
•    Double-click your Default Device, speaker, to open Properties

Speaker Enhancement
•    Go to the Enhancements tab, and then disable all sound effects.
•    Click OK and check how system interrupts is working.

3.     Check Hardware Drivers
Check if there is a driver issue. You can download the Windows SDK (Win32 and NET Development Tools) from Microsoft. This includes the Windows Performance Kit. Performance kit includes a tool called DPC Latency Checker. Deferred Procedure Call (DPC) is a process related to system interrupts. When the interrupt handler needs to defer a lower priority task until later, it calls on the DPC.
Corrupt drivers often cause a very high DPC latency. Once you found drivers with latency, you can remove them.

4.     Disable Internal Devices
You can disable individual device drivers to identify the problem if you have identified the potential cause.
Go to the Start Menu, Search for and open the Device Manager, expand the peripherals, right-click a device and select Disable.
Repeat this for one device at a time, then check the CPU usage of system interrupts or re-run DPC Latency Checker, afterwards right-click the device and select Enable before moving on to the next device.

Most common devices to check:
•    Internal modems
•    Network adapters
•    Internal sound devices
•    Any add-on cards, such as a TV tuner card, ISDN or DSL adapters, or modems

In-case none of these causes the problem, proceed with disabling and re-enabling other non-essential drivers.
NB: Do not disable any drivers necessary to run your system, these includes anything listed under Computer, Processors, and System device.
5.     Unplug or Disable External Devices
The problem can also be caused by USB hardware. Unplug it, while you are in the Device Manager— disable USB Root Hubs, which are blocking external hardware from interrupting the CPU.

Go to the Device Manager, you can locate it by entering Device Manager into the search bar on your Start menu. Scroll down to get to the Universal Serial Bus controllers and disable any USB Root Hub. Right click and click disable.
Device Manager
See if this fixed the issues. Click CTRL + ALT + DEL to open the Task Manager, Check out whether your CPU load is going down.

NB: Ensure your mouse and keyboard are not connected to one that you want to disable or they will stop working. Ensure you have an alternative method of re-enabling the device as using an external keyboard or a USB mouse they might stop functioning.

6.    Update Your BIOS
When you turn on your computer, the BIOS is among the first to be executed. It assists the operating system to boot. Check your BIOS version and counter check with the manufacturer’s website for updates and installation instructions.

Checking your BIOS version
•    Press Windows key + R,
•    Type cmd
•    Hit Enter or Click Ok
•    Execute the following two commands
1. systeminfo | findstr /I /c:bios
2. wmic bios get manufacturer, smbiosbiosversion

NB:The I in /I is a capital i, not a lower case L.
Checking your BIOS version
Note: Back up your system before updating the BIOS

7.     Kill Processes that are Not Needed and Disable them though Startup
Do you have programs that you do not require or use? Disable them via Startup and then do a reboot or if you only want to test it, kill the processes using the task manager.

8.     Kill High Disk IO Processes
High disk IO processes can also be an issue to system interrupts. Take a closer look at the resource monitor and monitor all processes with high disk IO.

There are more solutions to How to Fix High CPU Usage Caused by System Interrupts. We have only highlighted a few.

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