6 Ways To Fix System Interrupts That Causes High CPU Usage on Windows

Your device has a high CPU load rate, and the program that consumes the largest portion of CPU are the “system interrupts”? We’ll assist you in resolving this matter!

During this post, we’ll define system interruptions and discuss how to identify and resolve the root reason for the excessive CPU load.

What Does the Term “System Interrupt” Mean?

On your Task Manager, system interrupts seem to display as one of the Windows activities, although it is not actually a Windows activity. Rather than that, it acts as a representative, that is reporting the CPU consumption of the interrupts occurring at a lower/higher core usage.

When an interrupt occurs, it can be caused by hardware or software, including the CPU itself.

The CPU will only return to its previous state if the system interrupted handler job is completed.

Interrupts seem to be a mode of communication between hardware and software and the central processing unit (CPU). Consider the following example: whenever you are using the keyboard to write, the corresponding programs and the hardware transmit interrupts to the CPU, which causes the processor to initiate the operation of the data.

Similarly, when a mistake occurs, system interrupts can notify the CPU, about the significant surge. System interruptions will account for 0.1-2 of total CPU load on a functional system, but this depends on your CPU clock, the active program, and associated hardware, and other factors.

As long as your system is properly configured, even spikes of 3%-7% are within the acceptable range.

How to Reduce CPU Usage Due to System Interrupts

If system interruptions consume over 6% – 12% of your processor on a consistent basis, something is broken, and you’re probably facing hardware malfunction. We’ll assist you in determining the cause of this.

Always begin by rebooting your pc. If none of it helps, check below:

1. Disconnect or Turn Off All External Accessories

A common source of problems is USB devices. You can either disconnect your External drives or deactivate USB Ports/Hubs in your Device Manager (as shown in the image below), so you can prevent the external devices from interfering with the Processor.

Locate the category Universal Serial Bus drivers in Device Manager and deactivate any USB Port Connector entries you see.

It’s important to note that if you’re making use of a USB mouse or a USB (Wireless) keyboard, they may stop working. Ensure that you have a backup mechanism for re-activate those gadgets.

Suggestion for desktop pcs: Inspect your motherboard for any unneeded SATA cables and unplug it.

2. Verify Your Hardware Drivers

Users can use the DPC Latency Analyser to rapidly determine if you’re facing driver problem. System interrupts are associated with a process known as Deferred Procedure Call (DPC). Whenever an interrupt handler wants to postpone a lower-priority activity, it activates the DPC.

DPC Latency Monitor was created to determine if your computer is capable of handling real-time video or audio streaming by monitoring kernel-mode device driver runtime. This is an efficient method of identifying errors, and the program requires no installations.

If you notice red bars, which indicate drop-outs owing to excessive latency, something is wrong.

3. Turn Off All Internal Components

Instead of upgrading drivers randomly, begin by deactivating specific accessories drivers to identify the issue. If you’ve already found some possible offenders, you should deactivate them right away.

To deactivate a driver, navigate towards the Start Menu, then search for the Device Manager and open it (which is also available inside the Control Panel), explore the component listed in the section, and right-click on the device, and choose Disable.

Proceed with one item at a time, checking the CPU utilization of system interrupts or re-running DPC Latency Analyser, then right-clicking the device and choose Allow before proceeding to another.

The most common culprits are included the following:

  • Adapters for networks
  • Devices for internal sound
  • Internal modems
  • Any additional cards, such as a TV antenna, DSL adapters, or ISDN or modems

If none of the above is the culprits, you can continue to deactivate (and re-enable) any other drivers that may be causing problems.

Don’t ever deactivate any drivers that are required for your system to function properly, including those listed under Processors, Computer, or System device.

Additionally, avoid attempting to deactivate display drivers, the computer disk storage, IDE drivers, your mouse or keyboard (unless you can provide an alternate input gadget, e.g external keyboard), even the screen.

4. Turn off Audio Effects

This could be the option you’re searching for if you’re running Windows 7.

Kindly right-click on that speaker logo located in your taskbar, then choose the Playback devices, now double-tap your Default speaker so as to open the Properties, navigate to the Improvements tab, and Deactivate all audio effects. 

Verify with OK and monitor how systems interruptions are performing at the moment.

5. Remove Faulty Hardware

In the same way that a faulty driver can create system interrupts, failed hardware can do the same. In this instance, updating or reinstalling your drivers will have no effect.

Important note: Interrupts in the system might also be triggered by a malfunctioning power source or laptop adapter. Start by replacing or disconnecting it as well.

6. Perform a BIOS Update

Whenever you power on your laptop, the BIOS is the very first software program that runs. It aids in the booting of your operating system. To begin, identify your BIOS model and visit the company’s website to download any necessary updates and user guides for installation.

To determine your BIOS edition, enter Windows key + R, type in cmd, and push Enter. Then, one after the other, run the following two command lines:

  1. systeminfo | findstr /I /c:bios
  2. wmic bios get manufacturer, smbiosbiosversion

It is important to note that the I in /I is a capital I, not a lowercase letter L.

Important Note: Upgrading the BIOS is not something to be taken for granted. Ensure that you have a backup of your computer before proceeding.


Interrupts in the operating system can occur for a variety of reasons. Have you restarted your laptop as instructed previously? We believe you were successful in resolving the issue. If not please make use of the comment section for us to find another idea.

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