Has your laptop suddenly started to hesitate when opening programs, videos are stuttering, and the cursor is twitching like a drunk? This is not a reason to run to a service center - in 90% of cases the problem can be solved on your own. Slow operation of a laptop is rarely associated with hardware failures: it is often to blame contaminated system, overheating or incorrect settings.

In this article we will look at all possible causes of brakes - from the banal lack of free disk space to hidden mining viruses that steal the resources of your Intel Core i5 or AMD Ryzen 7. We will also provide checklists for diagnostics and step-by-step instructions on how to return your laptop to its former speed without reinstalling Windows.

Spoiler: if your MacBook Pro or Lenovo ThinkPad started to slow down after the update - this is not always the fault of the “crooked” firmware. Sometimes it is enough to clear the cache or reset the power settings. Let's start with the most obvious.

1. Overheating: why the laptop “suffocates” and how to check it

The first thing to exclude is thermal throttling. When the temperature of the processor or video card exceeds a critical threshold (usually 90–100°C), the system forcibly reduces their frequency to avoid damage. As a result, the laptop begins to lag even in simple tasks.

How to understand that overheating is to blame:

  • 🔥 The laptop case is hot (especially in the area of the ventilation grilles).
  • 💨 The cooler operates at maximum speed even when idle.
  • ⚡ Performance drops sharply 5-10 minutes after switching on.
  • 📉 B Task Manager (Windows) or Monitoring (macOS) the processor frequency “sags” below the base one.

To accurately diagnose the problem, use temperature monitoring programs:

  • Windows: HWMonitor, Core Temp, Speccy.
  • macOS: iStat Menus, Macs Fan Control.
  • Linux: sensors (utility from the package lm-sensors).
📊 How often do you clean your laptop from dust?
  • Once every 3–6 months
  • Once a year
  • Only when it starts to warm up
  • Never

Normal temperatures under load:

Component Norm (load) Critical temperature
Processor (Intel/AMD) 70–85°C 95–105°C
Video card (NVIDIA/AMD) 75–85°C 90–100°C
Hard drive (HDD/SSD) 40–50°C 60°C+
⚠️ Attention: If the processor temperature exceeds 90°C when idle (no load), turn off the laptop immediately! Continuing to work may result in thermal paste burnout or chip damage.

2. Lack of RAM: how to determine and what to do

If the laptop slows down when opening several browser tabs or starting Photoshop/AutoCAD, the problem is most likely in lack of RAM. Modern applications and websites actively consume memory: for example, one tab YouTube in 1080p can "eat" up to 1–1.5 GB RAM.

How to check memory usage:

  • 🪟 Windows: Open Task Manager (Ctrl+Shift+Esc) → tab Memory. If in the section Used more 80% of the total volume - there is not enough memory.
  • 🍎 macOS: Run System monitoring (Applications → Utilities) → tab Memory. Pay attention to the schedule Memory Pressure (if it is red, it needs cleaning).
  • 🐧 Linux: Enter the command in the terminal: 
    free -h

    See line used in the column Mem.

Solutions to the problem:

  1. Close unnecessary programs. For example, Telegram, Discord And Steam can consume 300–500 MB RAM even in the background.
  2. Disable startup. On Windows: Settings → Applications → Startup. On macOS: System Preferences → Users and Groups → Login Items.
  3. Use lightweight alternatives. Replace Chrome on Firefox or Edge, and Photoshop - on GIMP or Photopea.
  4. Add RAM. Most laptops allow you to increase the RAM up to 16–32 GB. Check compatibility on the manufacturer's website (for example, Crucial Memory Advisor).

Remove unnecessary programs in Settings → Applications

Turn off visual effects in Settings → System → About → Additional system settings → Performance

Set up the swap file: Control Panel → System → Advanced Settings → Performance → Advanced → Virtual Memory

Check your laptop for viruses using Malwarebytes or Kaspersky Virus Removal Tool-->

3. Full disk: why free space affects speed

If on the system disk (C: on Windows or / on macOS/Linux) less than 10–15% free space, the laptop will start to slow down. The reason is that the operating system does not have enough space for:

  • 📁 Swap file (virtual memory).
  • 🔄 Application cache and updates.
  • 🗃️ Temporary files, which are created when programs run.

How to clean up the disk:

  1. Remove trash using built-in tools:
    • 🪟 Windows: Settings → System → Storage → Disk Cleanup.
    • 🍎 macOS: About the program → Storage → Management.
  • Transfer large files to an external drive or to the cloud (Google Drive, Yandex Disk).
  • Disable hibernation (if you don't use it). On Windows, open a command prompt as an administrator and type: 
    powercfg /h off

    This will free up 10–20 GB on disk.

  • Check the disk for errors. On Windows: 
    chkdsk C: /f /r

    On macOS: open Disk Utility and select First aid.

    • Minimum space requirements:

    Operating system Minimum for stable operation Recommended stock
    Windows 10/11 15–20 GB 30 GB+
    macOS (Ventura/Monterey) 10–15 GB 25 GB+
    Linux (Ubuntu/Fedora) 5 GB 10 GB+
    💡

    If you have HDD, not SSD, disk defragmentation can speed things up. On Windows, run Disk optimization (Start → System Tools → Defragmentation). For SSD No defragmentation needed!

    4. Viruses and mining bots: how to detect and remove

    One of the most insidious reasons for brakes is hidden viruses, which use laptop resources to mine cryptocurrency or send spam. Symptoms of infection:

    • 🖥️ The laptop slows down even after a full reboot.
    • 🔌 The battery discharges 2-3 times faster than usual.
    • 📈 B Task Manager unknown processes are loading the processor on 30–100%.
    • 🌐 Internet traffic is growing for no apparent reason (check in Settings → Network → Data usage).

    How to check your laptop for viruses:

    1. Download antivirus utilities (do not install them on an infected PC!):
      • Kaspersky Virus Removal Tool (disposable scanner).
      • Dr.Web CureIt! (does not require installation).
      • Malwarebytes (finds mining bots well).
    2. Run the scan in safe mode:
      • 🪟Windows: Hold while booting Shift + F8 (or Shift + Reboot in the menu Start).
      • 🍎 macOS: hold Shift when turned on.
  • Check your browser extensions. Mining scripts are often hidden in suspicious plugins (for example, "AdBlock Pro" from unknown developers).
    • ⚠️ Attention: If the antivirus finds files with the extension .exe or .bat in folders AppData or Temp - it's almost certainly a virus. Do not remove them manually, use specialized tools!
    How do mining bots camouflage themselves in the system?

    Many viruses imitate system processes, for example:

    - svchost.exe (but with an unusual location, e.g. in C:\Users\).

    - WindowsUpdate.exe (actually mines Monero).

    - NVIDIA Container (a fake process that loads the video card at 100%).

    Check file location via Task Manager (right click → Open file location).

    5. Outdated software and drivers: why updates are important

    If your laptop slows down after updating Windows or macOS, the culprit may be incompatible drivers or broken system files. On the other hand, no updates also leads to brakes - for example, old versions NVIDIA GeForce Experience conflict with new games.

    How to update drivers:

    • 🪟 Windows:
      1. Open Device Manager (Win + X → Device Manager).
      2. Look for devices with an exclamation mark (yellow triangle).
      3. Right click → Update driver → Automatic search.
  • 🍎 macOS: Driver updates come with system updates (System settings → Software update).
  • 🐧 Linux: Use a package manager, for example: 
    sudo apt update && sudo apt upgrade

    • If after updating the drivers the laptop began to slow down even more:

    1. Roll back to the previous version. B Device Manager select Properties → Driver → Roll Back.
    2. Remove conflicting software. For example, Radeon Software from AMD sometimes conflicts with drivers Windows Update.
    3. Download the driver from the manufacturer's website. For example, for Lenovo Legion or ASUS ROG it is better to take drivers from the official website, and not from Windows Update.
    💡

    If your laptop is slow after updating Windows 11, try turning off unnecessary visual effects: Settings → Accessibility → Transparency effects And Animations. This can speed things up by 10-15%.

    6. Fragmented disk (for HDD) and SSD wear

    If your laptop has HDD (not SSD), over time the files on it “split” into fragments, and the disk head has to “jump” between sectors, which slows down reading/writing. For SSD fragmentation is not critical, but they have another problem - memory cell wear.

    How to check disk status:

    • 🪟 Windows:
      1. Open Command line on behalf of the administrator.
      2. Enter: 
        wmic diskdrive get status

        If the status OK - the disk is ok. If Pred Fail — make a backup urgently!

      3. For detailed diagnostics, use CrystalDiskInfo.
  • 🍎 macOS: Open Disk Utility and check S.M.A.R.T. status.
  • 🐧 Linux: Install smartmontools and do: 
    sudo smartctl -a /dev/sda

    • Solutions:

    • 🔄 For HDD: Defragment (Disk optimization on Windows).
    • 💾 For SSD:
      1. Check wear using CrystalDiskInfo (parameter Total Host Writes).
      2. If wear exceeds 70%, think about replacing the disk.
      3. Disable indexing for SSD (on Windows: Disk Properties → Allow Indexing - uncheck the box).

    7. Incorrect power settings

    Many users do not know that power mode directly affects performance. For example, in mode Energy Saving The processor runs at a reduced frequency, and the hard drive can turn off after 5 minutes of inactivity, which causes stuttering when waking up.

    How to set up power:

    • 🪟 Windows:
      1. Open Control Panel → Power Options.
      2. Select a scheme High performance.
      3. Click Set up power plan → Change advanced settings and install:
        • Minimum processor state: 100%.
        • Disabling the hard drive: Never.
        • PCI Express → Link Status: Maximum performance.
    • 🍎 macOS: Open System Settings → Battery and disable the option Optimized battery charging, if the laptop is connected to the network.
    ⚠️ Attention: If you are using a laptop on battery power, the mode High performance will reduce battery life by 30–50%. Switch to it only when working from the network!

    8. Hardware problems: when it’s time to take it to service

    If all software methods have been tried, but the laptop still slows down, the problem may be gland. Here are the signs of hardware problems:

    • 🔋 The battery is swollen or the laptop turns off when unplugged (even if the charge shows 100%).
    • 💥 Artifacts appear on the screen (color stripes, flickering) - a sign of problems with the video card.
    • 🔊 The hard drive makes clicking or grinding noises - a harbinger of imminent death HDD.
    • 🔌 The laptop does not turn on the first time or reboots spontaneously - there may be problems with the motherboard or power supply.

    What you can do yourself:

    • Check your RAM. Pull out the RAM sticks and wipe the contacts with an eraser (without pressing!). Reinstall them in the slots. If there are several strips, check one at a time.
    • Hard drive test. Use Victoria HDD (Windows) or badblocks (Linux) to check for bad sectors.
    • Reset BIOS/UEFI. Sometimes erroneous firmware settings cause slowdowns. To reset:
      1. Turn off your laptop.
      2. Disconnect the battery and power supply.
      3. Press and hold the power button on 30–60 seconds.
      4. Connect power and turn on the device.

    If the laptop still slows down, contact service. Average diagnostic cost: 500–1500 ₽. Repairs may cost 3000–15000 ₽ (replacing thermal paste, cleaning dust, replacing the battery or HDD on SSD).

    💡

    If your laptop is older than 5 years, replacement HDD on SSD (For example, Samsung 870 EVO or Crucial MX500) can speed up its operation by 3–5 times! Cost: from 3000 ₽ per drive 500 GB.

    FAQ: Frequently asked questions about laptop brakes

    ❓ The laptop slows down only in games. What's the problem?

    Most likely the culprits are:

    1. Video card overheating (check the temperature in MSI Afterburner).
    2. Outdated drivers (update them via GeForce Experience or AMD Adrenalin).
    3. Lack of RAM (for modern games you need a minimum 16 GB).
    4. CPU throttling (if the laptop is running on battery, the game may limit performance).

    Also check the graphics settings in the game: disable Ray Tracing and lower the resolution to 1920×1080.

    ❓ Why does my laptop slow down after updating Windows?

    Common reasons:

    • 🔄 Driver conflict (especially for NVIDIA or Realtek). Roll them back through Device Manager.
    • 🖥️ Included visual effects (in Windows 11 they are more resource intensive). Disable them in Settings → Accessibility → Transparency effects.
    • 🛡️ Windows Defender scans the system after an update. Wait until it finishes or disable it temporarily.
    • 🗑️ Temporary files left from the old version. Clean them through Disk Cleanup.

    If the brakes persist, try rolling back to a previous version of Windows within 10 days after update (Settings → System → Recovery).

    ❓ MacBook began to slow down after updating macOS. What to do?

    Here's what helps in 90% of cases:

    1. Reset NVRAM/PRAM:
      1. Turn off MacBook.
      2. Turn it on and press immediately Option + Command + P + R on 20 seconds.
    2. Clear system cache. Open Terminal and enter: 
      sudo purge
    3. Disable FileVault (if enabled). It encrypts the disk and may slow down on older MacBook (System Preferences → Protection and Security → FileVault).
    4. Remove unnecessary languages and architectures. Use the utility Monolingual (be careful - do not delete the necessary languages!).

    If MacBook still slows down, try reinstalling macOS in Recovery (Command + R when loading).

    ❓ The laptop slows down when connected to Wi-Fi. What's the matter?

    Possible reasons:

    • 📶 Weak Wi-Fi Signal (check the speed on speedtest.net). If the speed is lower 10 Mbit/s, the laptop may freeze when loading data.
    • 🔄 Wi-Adapter Driver outdated or conflicting. Update it via Device Manager.
    • 🛡️ Antivirus scans traffic. Disable this option in settings (for example, in Kaspersky or ESET).
    • 🔌 Power saving disables adapter. On Windows: Device Manager → Network Adapters → Properties → Power Management - uncheck the box Allow disconnect....

    If the problem is only with a specific router, try changing the Wi-Fi channel in the router settings (for example, with auto on 6 or 11).

    ❓ How to speed up an old laptop (5+ years) without an upgrade?

    Maximum optimization for weak laptops (Intel Core i3, 4–8 GB RAM, HDD):

    1. Install a lightweight OS:
      • 🪟 Windows: Windows 10 LTSC or Tiny10 (light version).
      • 🐧 Linux: Xubuntu, Lubuntu or Peppermint OS.
  • Turn off all visual effects (including Aero on Windows).
  • Use lightweight programs: