Laptop Overheating and Shutting Down

FreeTechSupport Team Updated Jun 20, 2026 2 min read

Laptops shut down automatically when they reach a thermal safety limit — usually around 90–100 °C on the processor. This is a protection mechanism, not a fault in itself. The real question is why it is getting that hot.

Immediately Stop and Let It Cool

If your laptop has just shut down from heat, leave it powered off for at least 15 minutes before restarting. Running it again immediately can cause damage.

Check Your Work Surface

Soft surfaces like beds, sofas, and lap cushions block the vents on the bottom of a laptop and trap heat. Always use a laptop on a hard, flat surface. A laptop stand or a simple book underneath can improve airflow significantly.

Clean the Vents

Dust building up inside the fan and heatsink is the single most common cause of chronic overheating. You can often see lint in the exhaust vent on the side or rear. Using a can of compressed air, briefly blow into the vents from the outside — this dislodges some dust without needing to open the machine. Avoid blowing for long continuous bursts as this can spin the fan beyond its rated speed.

Monitor Temperatures in Software

Download a free tool such as HWMonitor or Core Temp and run it while doing normal tasks. If the CPU temperature sits above 85 °C under light load, the heatsink is not doing its job properly and the thermal paste may need replacing — a job for a technician if you are not comfortable opening the laptop.

Manage the Power Plan

In Windows, go to Settings > System > Power & sleep > Additional power settings and switch to the Balanced power plan. The High performance plan pushes the CPU harder and generates more heat. Many laptops also have their own power-management software that can dial down performance when you do not need it.

Check for Runaway Processes

Press Ctrl + Shift + Esc to open Task Manager and click the CPU column header. If one process is using a high percentage of the CPU constantly, that is generating excess heat. Malware scans sometimes reveal the cause.

If the laptop keeps shutting down after these steps, the thermal paste or internal fans may need professional attention. Ask us and we can advise further.

Frequently asked questions

For most home users, once or twice a year is sufficient. If you have pets, smoke indoors, or use the laptop in dusty environments, clean the vents every three to four months. A quick external blast with compressed air every few months keeps dust from building up into a serious blockage.

No, a laptop at idle should run cool and quiet. Open Task Manager and check whether any background process — antivirus scan, Windows Update, a browser extension — is consuming significant CPU. If the CPU is near 0% and the laptop is still very hot, the fan or heatsink is likely clogged and needs cleaning.

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