Summary

This guide helps you troubleshoot and resolve: How to fix high CPU usage caused by System Interrupts on Windows 11. Follow the steps below to fix the issue.

Common Causes

How to fix high CPU usage caused by System Interrupts on Windows 11

System Interrupts is a Windows process that manages communication between your hardware and the operating system. When this process shows high CPU usage in Task Manager, it usually indicates a problem with a hardware driver or a malfunctioning device. This can cause your computer to run slowly, freeze, or become unresponsive.

Quick Fix Steps

1. Restart your computer to clear temporary system glitches.
2. Disconnect any external USB devices, such as printers, webcams, or external drives, then restart to see if the CPU usage drops.
3. Ensure your Windows 11 is fully updated via Settings > Windows Update.

Detailed Instructions

1. Update Device Drivers

Outdated or corrupted drivers are the most common cause of high System Interrupts.

1. Right-click the Start button and select Device Manager.
2. Expand the categories and look for any devices marked with a yellow warning triangle.
3. Right-click the affected device and select Update driver.
4. Choose Search automatically for drivers and follow the on-screen prompts.
5. Restart your computer once the updates are complete.

2. Disable Fast Startup

Fast Startup can sometimes cause conflicts with hardware drivers during the boot process.

1. Open Control Panel and go to Hardware and Sound > Power Options.
2. Click Choose what the power buttons do on the left sidebar.
3. Click Change settings that are currently unavailable.
4. Untick the box for Turn on fast startup (recommended).
5. Click Save changes and restart your PC.

3. Check for Hardware Issues

If the problem persists, a failing hardware component may be triggering constant interrupts.

1. Open Device Manager again.
2. Disable devices one by one (such as network adapters or audio controllers) to identify if a specific piece of hardware is causing the spike.
3. After disabling a device, monitor Task Manager (Ctrl + Shift + Esc) to see if the CPU usage normalizes.
4. Re-enable the device if it is not the cause, and move to the next one.

Troubleshooting

If high CPU usage continues after following these steps, the issue may be related to a deeper system conflict or a failing motherboard component.

• If your computer is also running slow generally, check for background processes consuming resources.
• If your applications are freezing or crashing, this may be linked to the same hardware conflict.
• If you encounter a Blue Screen of Death (BSOD), follow the restart steps provided in our dedicated guide.
• If you are experiencing browser loading issues, this could be a symptom of overall system instability.

If you are unable to resolve the issue, you can Open a Ticket for further assistance from our Brisbane support team.

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