29 April 2026

Laptop overheating or loud fan noise: what can you do?

laptophardwareoverheating

A laptop that gets hot or constantly blows loudly is annoying. Sometimes it is harmless, for example during updates or heavy programs. But if the fan is always noisy, the laptop becomes slow or it shuts down by itself, something else may be wrong.

Heat problems are usually caused by dust, poor airflow, heavy background processes or old thermal paste. You do not need to buy a new laptop right away, but you should know what is safe to check yourself.

When is heat normal?

A laptop may get warm during:

Windows updates
video calls
many browser tabs
photo or video editing
games or heavy software
charging while working

If the bottom gets warm, but everything stays stable and quiet during normal use, there is usually no issue.

It becomes more suspicious when:

the fan constantly runs at full speed
the laptop slows down as soon as it gets hot
it shuts down without warning
the casing feels very hot
you smell burning
the battery is swollen or pushes the casing open

If the battery is swollen, stop using the laptop and have it checked. That is not a software problem.

Step 1: put the laptop on a hard surface

Many laptops pull in air from the bottom. On a bed, sofa, blanket or soft mouse mat, those openings are blocked. The temperature rises quickly and the fan has to work harder.

Use your laptop on:

a desk
a laptop stand
a hard table
a flat surface with room around the vents

It sounds simple, but it often partly solves the problem.

Step 2: check which programs use the most resources

A loud fan does not always mean dust. Sometimes your laptop is simply working hard.

On Windows:

Press Ctrl + Shift + Esc.
Open Task Manager.
Sort by CPU or Memory.
Check which programs are at the top.

If you see Chrome, Teams, OneDrive, antivirus software or Windows Update at the top, that may be the cause. Close what you do not need and wait a few minutes.

If the laptop stays heavily loaded without open programs, further diagnosis is useful.

Step 3: check dust and air vents

Dust collects in the vents and around the cooling fins. After a few years, it can seriously reduce airflow. The laptop compensates by blowing harder.

What you can safely do yourself:

shut the laptop down completely
unplug the charger
check whether the vents are visibly dusty
clean the outside gently with a soft brush

Be careful with compressed air. If you blow too hard or let the fan spin freely, you can cause damage. In compact laptops, you may also push dust deeper inside instead of removing it.

Step 4: update, but avoid random tools

Drivers, BIOS updates and Windows updates can affect fan behavior. But do not install random “driver booster” or “PC cleaner” tools. They often make things worse.

Safe steps:

install Windows updates
only use support software from your laptop brand
remove unknown optimization tools
restart after updates and test again

If you are unsure, have it checked first.

When is cleaning or thermal paste needed?

If a laptop is older than three to five years and keeps getting warmer, internal cleaning can help. Dust and dirt are removed from the cooling system. On some devices, the thermal paste is also replaced: this is the layer between the processor and cooler that helps transfer heat.

Signs that cleaning may be needed:

fan blows hard during light tasks
laptop feels much warmer than before
performance drops after a few minutes
fan makes rattling or scraping noises
laptop shuts down under load

A proper cleaning is most useful when the laptop is otherwise still good: enough RAM, a decent SSD and no other hardware problems.

When is repair no longer worth it?

Not every hot laptop is worth repairing. If the device is very old, has a worn battery, little RAM, a slow hard drive and physical damage, replacing it may be smarter.

A diagnosis helps make that decision honestly. Sometimes cleaning is enough. Sometimes an SSD upgrade is the better move. Sometimes replacement is the most logical choice.

What not to do

Avoid these quick fixes:

keep using the laptop if it shuts down by itself
cover the ventilation openings
install unknown cleaner software
open the laptop without proper tools
use cheap universal chargers
ignore a swollen battery

Heat problems usually get worse if you keep postponing them.

Need help with a hot or noisy laptop?

DeskCare can check, clean and assess whether an upgrade is still worth it. Hardware work is handled by appointment with drop-off in Evergem.

View hardware upgrades and laptop diagnosis or contact DeskCare with the brand, model and a short description of the problem.