Tablets, laptops & consoles

Laptop slow, loud or overheating

A loud fan and a hot, sluggish laptop usually mean blocked vents, too many programs at start-up or a nearly full drive. Here’s how to fix it safely.

  • Fix it yourself
  • Easy
  • 20 min
  • Laptops
Close-up of a laptop cooling fan and circuit board

Quick answer: use the laptop on a hard, flat surface, close heavy programs, stop unnecessary apps opening at start-up, free up disk space and install updates. If the fan is still loud, the inside probably needs a professional dust clean.

1. Let it breathe

Laptops pull air in through vents underneath or at the sides. Using one on a bed, sofa or lap blocks them. Use a table, a tray or a laptop stand.

2. Find what’s working it hard

Windows

Press Ctrl + Shift + Esc to open Task Manager. Sort by CPU and Memory and close programs you don’t need.

Mac

Open Activity Monitor (Applications → Utilities). Sort by % CPU.

Browsers

Dozens of open tabs use lots of memory. Close the ones you don’t need.

3. Speed up start-up

  • Windows: Task Manager → Startup apps – disable programs you don’t need at start-up.
  • Mac: System Settings → General → Login Items.

4. Free up space and update

  1. Keep at least 15–20% of the drive free.
  2. Empty the Recycle Bin / Bin and Downloads folder.
  3. Install Windows Update or macOS updates, then restart.
  4. Run a scan with your built-in security software (Windows Security on Windows).

5. Clean the vents – carefully

With the laptop switched off and unplugged, give the outside vents a few short puffs of compressed air from a distance. Don’t hold the can upside down, and don’t blast air straight at the fan for long – spinning it too fast can damage it.

Don’t open the laptop yourself. Inside are fragile ribbon cables and, on many models, a battery that can be damaged by screwdrivers.

When it needs a service

  • The fan is loud even when the laptop is idle.
  • It shuts down by itself when busy.
  • It’s several years old and has never been cleaned inside.
  • It’s slow even after these steps – an older hard drive upgraded to an SSD can feel like a new laptop.

We clean laptops internally, replace worn fans and thermal paste, and upgrade drives. Bring it in for a free diagnosis.

Still not working? We’ll take a look free.

Diagnosis is free and it’s no fix, no fee. We confirm the price before we start, and standard repairs have a 1-year warranty.

This guide is general advice for common problems. The steps don’t involve opening your device. Menu names can differ slightly between models and software versions. If your device gets hot, swells, smokes or smells of burning, stop using it, keep it away from anything flammable and get help. Opening a device yourself can damage it and affect any manufacturer warranty.

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