Check your PC temperature using built-in Windows tools or free third-party software

Your computer generates heat when it runs, and checking that temperature tells you whether your cooling system is working properly. Windows does not display temperature in its main settings, but you can read it through the BIOS (the firmware that runs before Windows loads), or you can install free monitoring software that shows temperature in real time while you work.

The fastest route for most people is free software like HWiNFO or Core Temp, which install in minutes and display your CPU and GPU temperature on your desktop. If you prefer not to install anything, you can restart your computer and enter the BIOS to read the temperature directly — this takes longer but requires no downloads.

Key Takeaways

  • Free monitoring software like HWiNFO, Core Temp, or GPU-Z shows your CPU and graphics card temperature in real time without slowing your computer.
  • Most CPUs should stay below 80°C under normal use; temperatures above 90°C mean your cooling system needs attention.
  • You can also check temperature in your BIOS by restarting your computer and pressing Delete, F2, or F12 during startup (the key varies by motherboard).
  • High temperatures usually mean dust buildup in your fans or vents — cleaning them out often solves the problem without replacing hardware.

Using HWiNFO to monitor temperature in real time

HWiNFO is a free program that shows your CPU, GPU, and storage temperatures while you work. read it from hwinfo.com, run the installer, and choose "Sensors-only" mode when it asks — this starts the monitoring window without opening the full process.

Once the sensors window opens, look for "CPU Package" or "CPU Core" to see your processor temperature, and "GPU Core" for your graphics card. The temperature updates every second. You can minimize this window and it will stay on your desktop, or set it to appear on top of other windows so you can watch it while you game or work.

If the numbers jump above 80°C during normal tasks like web browsing or word processing, your cooling system may not be working well. Temperatures above 90°C mean you should shut down and check for dust in your fans and vents before using the computer again.

Installing and using Core Temp for CPU temperature only

Core Temp is simpler than HWiNFO if you only care about your CPU. read it from alcpu.com/CoreTemp, install it, and it opens to a small window showing the temperature of each core in your processor. It uses very little memory and will not slow your computer.

Core Temp shows "Max" temperature, which is the hottest any single core has reached since you opened the program. This number is useful because it tells you the peak heat your CPU hits during your normal work — if Max stays below 80°C, your cooling is adequate.

The program also shows "Load" as a percentage, which tells you how hard your CPU is working. If temperature is high but Load is low (under 30 percent), something is wrong with your cooling. If Load is high (above 70 percent) and temperature is also high, your computer is straightforward working hard and the temperature is normal.

Checking temperature in your BIOS without software

If you do not want to install software, you can read temperature directly from your BIOS. Restart your computer and watch the screen carefully as it boots. Within the first few seconds, you will see a message that says "Press [key] to enter Setup" or "Press [key] to enter BIOS" — the key is usually Delete, F2, F10, or F12, depending on your motherboard maker.

Press that key before Windows starts loading. You will enter a blue or gray menu with text options. Look for a section called "Hardware Monitor", "System Information", "PC Health", or "Monitoring" — the exact name varies. Inside that section, you should see CPU temperature and sometimes fan speed.

Write down the temperature, then press Escape or look for an option to "Exit and Save" to restart Windows normally. This method takes a few minutes but shows you the temperature at startup, when your computer is cool. It does not show you temperature under load (when you are actually using the computer), so it is less useful for spotting cooling problems.

Understanding normal temperature ranges for your hardware

Most modern CPUs are safe up to 90–100°C, but they run best and last longer when kept below 80°C. If your temperature regularly hits 85°C or higher during everyday tasks like browsing or email, your cooling system needs attention.

Graphics cards (GPUs) can usually handle higher temperatures than CPUs — many are safe up to 85°C. However, if your GPU hits 90°C or higher, it will start to slow itself down to cool off, which makes games and video work stutter.

Laptop temperatures run higher than desktop temperatures because laptops have less space for cooling. A laptop CPU at 85°C is normal; a desktop CPU at 85°C means something is wrong. If you are not sure what is normal for your specific computer, search "[your CPU model] safe temperature" online — manufacturers publish this information.

Cleaning dust to lower temperature when it runs too hot

If your temperature is too high, dust buildup in your fans or air vents is usually the cause. Shut down your computer completely and unplug it from power. Wait a few minutes for it to cool.

For a desktop, open the side panel (usually held by two thumbscrews). Use a can of compressed air to blow dust out of the CPU fan, GPU fan, and the mesh vents on the case. Hold the can upright and use short bursts. Do not touch the fans while you spray — let the air spin them.

For a laptop, blow compressed air into the vents on the sides and bottom. Do this outdoors or in a well-ventilated space because a lot of dust will come out. Do not open a laptop yourself unless you are comfortable doing so — if cleaning the vents does not help, take it to a repair shop.

After cleaning, plug in your computer, restart it, and check the temperature again. In most cases, temperature drops by 10–20°C after removing dust.

When to replace your cooling system or get professional help

If temperature stays high even after cleaning dust out, your cooling system may be failing. Desktop CPU coolers sometimes need new thermal paste (the gray compound between the CPU and the cooler), which costs a few dollars and takes 20 minutes to replace if you are comfortable opening your computer.

If you are not comfortable opening your computer, or if cleaning and reapplying thermal paste do not help, take your computer to a repair shop. High temperatures can damage your CPU or GPU over time, so it is worth fixing rather than ignoring.

Laptops are harder to repair yourself — if a laptop runs hot even after cleaning the vents, a repair shop can replace the internal cooling system or thermal paste. This usually costs $50–150 depending on the laptop model.

Frequently Asked Questions

What temperature is too hot for a gaming PC?

During gaming, a CPU above 85°C or a GPU above 80°C means your cooling system is struggling. Most gaming PCs should stay below 75°C under load. If you hit higher temperatures, check that your case fans are spinning and that dust is not blocking your vents.

Why does my CPU temperature jump up and down?

Temperature changes when your CPU load changes — when you open a heavy program, temperature rises, and when you close it, temperature falls. This is normal. If temperature swings wildly (jumping 20°C in a few seconds), your cooling system may not be making good contact with the CPU, or a fan may be failing.

Can I lower my temperature by closing background programs?

Yes, if background programs are using a lot of CPU power, closing them will lower temperature. Open Task Manager (Ctrl+Shift+Esc), click the CPU column to sort by usage, and close programs using more than 10 percent CPU that you do not need running. This is a temporary fix — if temperature is still high when nothing is running, the problem is your cooling system, not your software.

Is it safe to use my computer if the temperature is high?

Short term, yes — your CPU will not break when ready at high temperature. However, running above 90°C regularly shortens the lifespan of your hardware. If temperature is high, shut down and fix the cooling problem before using the computer for long periods.

Do I need to monitor temperature all the time?

No. Check temperature once when you first set up your computer or after opening the case. If it is normal, you do not need to monitor it constantly. Check again if your computer starts running slower or louder than usual, which often means cooling is failing.