Laptop Fan Loud When Doing Nothing Windows 11 Fix [2026]

Quick Answer: Fan loud at idle due to dust buildup, high-performance power plan, or background processes. Change power plan to Balanced and clean laptop vents with compressed air.

Symptoms

Fans spin constantly even when idle
Laptop hot to touch
Noise when not running apps
Started suddenly

Root Cause

Dust blocking airflow, power plan set to High Performance, or malware using CPU.

Fix

Method 1: Change Power Plan

Control Panel → Power Options → Balanced (recommended)

Method 2: Check CPU Usage

Get-Process | Sort-Object CPU -Descending | Select-Object -First 5

Method 3: Clean Vents

Use compressed air to blow dust from laptop vents.

Method 4: Check for Malware

Run Windows Security full scan.

How Againly Helps

Againly can inspect the relevant local evidence and propose a fix plan for review.

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Related: Sleep Mode Fix

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