Every laptop generates heat as a byproduct of its electronics working. The cooling system — vents, heat pipes, and a fan — is designed to manage this heat. When it can't keep up, you get overheating.
Why laptops overheat
The most common cause by far is dust buildup. Over months and years, dust accumulates inside the laptop, clogging the vents and coating the fan. This insulates the components and prevents heat from escaping. Other causes include a failing fan, dried-out thermal paste between the CPU and heatsink, and simply running demanding tasks on inadequate hardware.
Signs of overheating
- The laptop is very hot to touch on the base or keyboard
- The fan runs at maximum speed constantly
- Performance drops noticeably under load (thermal throttling)
- Unexpected shutdowns or crashes under load
What you can do
For surface-level dust: use compressed air through the vents. For deep cleaning (required every 2–3 years): the laptop needs to be opened and cleaned internally — the fan and heatsink need to be removed and cleaned, and the thermal paste between the CPU and heatsink needs to be replaced. This is a job for a professional.
Using a laptop stand that elevates the base and improves airflow can also help, as can using the laptop on hard surfaces rather than soft ones like beds or sofas which block the vents.
Overheating laptop?
Darren performs deep internal cleans and thermal paste replacement across Okehampton and Devon. This often transforms performance.
📞 Call 07564 432851