High CPU usage in Windows 11

Establish the scope

Confirm when fans stay loud and whether cpu use stays high. Note the exact time and the last relevant change, then compare the closest known-good device, account, connection, or application using the same task.

Apply the safer fix first

Observe for several minutes and identify the process. Let legitimate updates or security scans finish; do not end unfamiliar system services.

1. Record the current state related to sort task manager by cpu.
2. Apply the narrow change, then check whether fans stay loud.
3. Continue only if the result still points toward runaway app.

Investigate the cause

Repair the named app. For sustained System interrupts, disconnect peripherals one at a time and check OEM chipset and device drivers.

Protect the recovery path

Before work that could affect performance, protect relevant files and sign-in or recovery credentials. Keep the original error wording and the results involving update or scan, runaway app, driver interrupts for support.

Verification

• Repeat the affected task under the same conditions used to confirm fans stay loud. Confirm the symptom is gone, not merely that a Windows status label changed.
• Repeat the relevant connection, startup, sign-in, sleep, application, or device transition and specifically check whether cpu use stays high.

When to stop

Do not continue with broader resets when temperature warnings, shutdowns, unknown processes, or persistent interrupts appear. Preserve the observations already collected and use the device maker, network administrator, Microsoft support, a qualified repair technician, or data-recovery help according to the evidence.

Review the safe troubleshooting workflow before any broader recovery step.