Your laptop is running hot, the fan is screaming, and the screen is about to shut down as a safety measure. This page gives you a 7-step order of operations to drop the temperature, starting with the zero-cost checks and ending with the parts that need replacing.
In short: Most overheating issues are solved by cleaning dust from the vents or changing the power plan in Windows. If those fail, you need to replace the thermal paste, which drops chip temperatures by 10-20 degrees. You will need a small screwdriver set and compressed air to get through the physical fixes.
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Why Your Laptop Is Overheating Right Now
Heat is a byproduct of the CPU and GPU working. When the cooling system can’t move that heat out, the processor slows down to prevent permanent damage. For the detail, see our notes on basic laptop diagnostics.
This slowing is called thermal throttling. You feel it as a sudden lag or a hard shutdown.
You can usually find the cause in one of these four places:
- Dust blockage: Dust acts like an insulator, trapping heat inside the chassis.
- Dried paste: After 2-3 years, thermal paste loses its ability to transfer heat from the chip.
- Software load: Background updates or malware can pin the processor at 100% power draw.
- Poor ventilation: Using the device on blankets or beds blocks the air intake vents.
Step 1: Move the Laptop to a Hard Surface
Start here before you open anything. If you are on a bed, couch, or carpet, the airflow is blocked.
The air vents on the bottom need to breathe. A soft fabric absorbs that heat and blocks the fan.
Move the device to a desk or a hard floor.
If you don’t have a desk, use a closed, hardcover book or a notebook to lift the back of the laptop by 1.5 inches.
Check it worked: The fan should drop in pitch within 60 seconds. The bottom should feel cooler to the touch.
Step 2: Find the Process Eating Your CPU
Check for a runaway app. A single program can keep the processor at maximum power and drive the heat up. If that sounds like your bench, read up on cooling a hot laptop next.
Press Ctrl + Shift + Esc to open Task Manager on Windows. On a Mac, use Activity Monitor.
Look at the CPU or Energy column. Anything over 50% is suspicious.
End the task for non-essential apps. If you see Windows Update, let it finish before restarting.
Check it worked: The CPU usage bar drops to under 10% when you are just typing.
Step 3: Change Your Power Plan to Balanced
High-performance modes keep the CPU clock speed high. This makes the fan run constantly to keep up.
Go to Settings > System > Power.
In Windows 11, look for the power button. In Windows 10, go to Control Panel > Power Options.
Select Balanced. Do not use High Performance unless you are gaming or rendering video. It helps to understand resolving frequent system freezes before going further.
Check it worked: The fan noise reduces significantly when you are not doing heavy work.
Step 4: Blow Dust Out of the Vents
This is the most common physical fix. Dust acts like a blanket over the fan blades.
Power off the laptop and unplug the charger.
Use a can of compressed air or an electric blower. Hold the can upright.
Blast short bursts into the exhaust vents. Use a soft brush to dislodge the dust first.
Tip: Hold the fan blades still with a toothpick while you blow so they don’t spin out of control.
Check it worked: You see dust coming out, and the fan runs quieter after the laptop boots back up. We cover stop lagging mouse in a guide of its own.
Safety first: Always power off and unplug the laptop first. Do not hold the can upside down, or you will spray liquid propellant into the board.
An electric blower provides consistent pressure without pushing liquid propellant into the fan.
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Step 5: Replace the Thermal Paste
If your laptop is more than two years old, the paste between the chip and the heat sink is likely dry.
This requires opening the bottom panel. Look up a teardown guide for your specific model before you start.
Clean the old paste off the chip and the heat sink using 90% isopropyl alcohol.
Apply a pea-sized amount of new paste to the center of the chip.
Check it worked: You should see a 10 to 20-degree drop in temperature under load.
Safety first: Disconnect the battery first. If the battery looks swollen or puffy, stop immediately; it is a fire risk and must be replaced by a pro.
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Step 6: Fix Laptop Overheating With a Cooling Pad
Sometimes the internal fans just aren’t powerful enough for your workload.
A cooling pad provides external airflow to help push the hot air out.
Look for pads with large, quiet fans that align with your laptop’s intake vents.
This is best for gaming laptops or heavy video editing sessions.
Check it worked: The temperature stays flat even when you run a heavy benchmark for 30 minutes.
Step 7: How to Stop It Happening Again
Prevention is the only way to keep the cooling system healthy long-term.
Set a reminder to clean the vents every 6 months. Blow out the intake and exhaust ports with compressed air.
Keep the laptop on a hard surface whenever possible. Avoid using it on your lap.
Monitor your CPU temperatures with a free tool like HWMonitor. If idle temperatures exceed 60°C, it is time for a deep clean.
Ensure you are using the original charger. A failing adapter can cause the laptop to work harder than necessary, increasing heat generation and battery stress.
The bottom line
Start by moving your laptop to a hard surface and checking your power plan. If the temperatures are still high, the next step is cleaning the vents and replacing the thermal paste.
- MX-7 features a performance-optimized, dense, and highly viscous consistency. Its high
- High cohesion prevents pump-out, dry-out, or bleeding even under repeated thermal
Frequently asked questions
Why is my laptop fan always running?
The fan runs to remove heat from the chip. If it is loud all the time, your power plan is likely set to high performance, or dust is blocking the fan’s airflow. Cleaning the vents is the usual fix.
Is it normal for a laptop to be hot?
Mild warmth is normal. However, the bottom should not be too hot to hold. If the laptop shuts down, the temperature has hit the safety limit, which means the cooling system is failing.
What temperature is dangerous for a laptop?
Most modern CPUs start to throttle at 90-100 degrees Celsius (194-212 degrees Fahrenheit). Staying under 85 degrees is ideal for long-term hardware health.
Can I use WD-40 to clean the fan?
No. WD-40 leaves a sticky residue that attracts more dust and can damage the fan motor. Use compressed air for dust and isopropyl alcohol for thermal paste.