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    Troubleshooting
    Beginner
    4 min read 7 stepsMay 3, 2026Verified May 2026

    Computer Fan Is Loud and the Computer Feels Hot

    A roaring fan or an unusually hot laptop is your computer asking for help. Here's what's causing it and what you can do today to bring the temperature down.

    At a Glance

    Category
    Troubleshooting
    Difficulty
    Beginner
    Read Time
    4 min read
    Steps
    7
    Topics covered
    fan
    overheating
    computer
    performance
    maintenance

    In this guide (7 steps):

    1. 1.Do not use the computer on soft surfaces
    2. 2.Check what is using the processor
    3. 3.Clean the air vents
    4. 4.Reduce the number of browser tabs
    5. 5.Make sure software updates are not running
    6. 6.Restart the computer
    7. 7.When to call a professional
    1

    Do not use the computer on soft surfaces

    ~28s
    Never place a laptop on a bed, a pillow, a couch cushion, or carpet. These materials block the air vents on the bottom and sides, trapping heat inside. Always use a laptop on a hard, flat surface. A laptop cooling pad (sold online for $15–$30) provides additional airflow and is worth the investment if you primarily use a desk.

    Warning

    Using a laptop on a bed or carpet for extended periods is one of the most common causes of early fan and motherboard failure.

    2

    Check what is using the processor

    ~29s
    Open Task Manager on Windows (press Ctrl + Shift + Esc, or right-click the Start button). On Mac, open Activity Monitor (find it in Applications > Utilities). Look at the CPU column and sort by usage. If any program is using 80–100% of the CPU, that is what is making the fan run hard. You can click that program and choose 'End Task' (Windows) or 'Force Quit' (Mac) to stop it.

    Quick Tip

    Common culprits: antivirus scans, software updates running in the background, or a browser with many tabs open.

    3

    Clean the air vents

    ~24s
    Dust builds up in vents over months and years, blocking airflow and trapping heat. Look for the vent openings on the sides and bottom of a laptop, or the back and sides of a desktop tower. Use a can of compressed air (sold at office supply stores for about $8) to blow dust out of the vents. Do this outdoors or over a trash can — a surprising amount of dust can come out.
    4

    Reduce the number of browser tabs

    ~18s
    Each open browser tab uses memory and some processor power. If you have 15 or 20 tabs open, try closing most of them and see if the fan quiets down. Bookmark anything you want to return to: in any browser, press Ctrl+D (Windows) or Command+D (Mac) to bookmark the current page.
    5

    Make sure software updates are not running

    ~22s
    Windows and Mac updates download and install in the background, which can push the processor hard for 20–30 minutes. If this is a sudden issue that started today, check if an update is in progress. On Windows, go to Settings > Windows Update. On Mac, go to System Settings > General > Software Update. If an update is running, let it finish before drawing conclusions.
    6

    Restart the computer

    ~17s
    A simple restart closes all running processes and lets the computer cool down. After restarting, give it 10 minutes of light use and see if the fan returns to normal. Many fan issues are caused by processes that get stuck after days or weeks of continuous use without a restart.
    7

    When to call a professional

    ~21s
    If the fan is extremely loud even when the computer is barely doing anything, if the computer shuts itself off due to heat, or if it is more than 5 years old, the internal thermal paste may need to be replaced by a repair technician. This is a $30–$60 repair at most computer shops and can dramatically extend the life of the machine.

    You Did It!

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    Need more help? Book a TekSure tech

    When your computer's fan suddenly gets loud or runs at high speed all the time, it is working hard to cool something down. This is the computer's built-in protection system. It is trying to prevent heat damage to its internal parts. Taking action sooner rather than later is important, because excessive heat over time can shorten the life of a computer.

    The most common causes are something demanding running in the background that is using a lot of the processor, dust blocking the air vents, the computer sitting on a soft surface like a bed or carpet that blocks airflow, or — for older computers — dried-out thermal paste inside (this requires professional repair).

    The good news is that most of the fixes are straightforward and free.

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    fan
    overheating
    computer
    performance
    maintenance

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