IT Support4 min read

Overheating laptop: causes, risks and what you can do

Lams IT Solutions

20 December 2025

Why does a laptop overheat?

You can fix an overheating laptop in three steps: use the device on a hard, flat surface, blow dust out of the ventilation openings with compressed air, and close unnecessary heavy programs via Task Manager. The two most common causes are blocked ventilation openings due to dust and dried-out thermal paste — you can tackle the first one yourself, but the second requires professional help.

The most common causes:

Blocked ventilation openings from dust accumulation — the most common cause in laptops older than two years.

Dried-out thermal paste between the processor and the heatsink, reducing heat transfer.

Use on soft surfaces like a bed or cushion that block the ventilation openings.

Heavy software that pushes the processor to maximum for extended periods (video editing, games, virtual machines).

High ambient temperature, for example in a warm room or in direct sunlight.

Signs that your laptop is getting too hot

The fan runs constantly at high speed and makes a lot of noise.

The keyboard or the bottom of the laptop is uncomfortably warm.

The computer becomes noticeably slower (thermal throttling: the processor reduces its speed to cool down).

The laptop shuts down unexpectedly without warning.

What you can do yourself

Use the laptop on a hard, flat surface

A desk or table allows air to circulate beneath the device. Avoid cushions, blankets and your lap.

Clean the ventilation openings

Blow dust away with a can of compressed air (available at computer shops). Aim the can at the ventilation openings and blow in short bursts. Never do this with a vacuum cleaner, which can cause static electricity.

Check which programs are loading the processor

Open Task Manager (Ctrl + Shift + Esc) and sort by CPU usage. Close processes you don't need.

Consider a laptop cooler

A cooling pad with built-in fans (USB-powered) noticeably reduces the temperature during intensive use.

Adjust the power settings

In Windows, set the power plan to "Balanced" instead of "High performance" when you're not running heavy tasks.

When professional cleaning is needed

If dust has accumulated deep inside the cooling system or the thermal paste has dried out, a thorough internal cleaning and paste replacement is needed. This requires opening the laptop — something Lams IT Solutions does for you safely and professionally. Explore our IT Support services or call us.