Laptop slowdown is one of the most common problems faced by users 1-3 years after purchase. The system begins to “think” when opening programs, the video slows down, and sometimes the screen even freezes for several seconds. In 90% of cases, this is not a hardware failure, but a consequence of accumulated errors, system overload or outdated drivers.

In this article we will look at all possible causes of brakes - from a banal lack of RAM to hidden viruses and hard drive wear. You will receive step by step instructions for Windows 10/11, macOS and Linux, and also find out when it’s time to take your laptop to a service center. We will pay special attention hidden BIOS settings that can speed up work by 20–30% without upgrading hardware.

1. Diagnostics: why did the laptop start to slow down?

Before you begin “treatment”, you need to identify the root of the problem. Brakes can occur due to:

  • 🔋 Lack of RAM (especially when working with a browser, photoshop or games).
  • 🖥️ Overloaded processor (viruses, background processes, mining scripts in the browser).
  • 💾 Wear or fragmentation of the hard drive (HDD slows down 5–10 times more than SSD).
  • 🔄 Driver conflicts (especially after updating Windows or installing new programs).
  • 🦠 Viruses and malware (even if the antivirus doesn’t find anything).

To accurately determine your weak point, use the built-in diagnostic tools:

  • 📊 Windows: open Task Manager (Ctrl+Shift+Esc) → tab Performance. See which resource is 90–100% loaded (CPU, RAM, Disk).
  • 🍎 macOS: run System monitoring (program in Programs → Utilities).
  • 🐧 Linux: enter the command in the terminal 
    top
    or 
    htop
    (install via 
    sudo apt install htop
    ).

If laptop freezes when turned on or slows down immediately after booting the system, the problem is most likely in startup or damaged system files. If lags appear after 10–20 minutes of work, it’s your fault overheating or memory leak.

📊 How often does your laptop slow down?
  • Constantly
  • Only when running heavy programs
  • After Windows update
  • Rare, but critical
  • Doesn't slow down

2. System cleaning: remove junk and unnecessary programs

The most common cause of brakes is clogged system. Over the years of use, temporary files, browser caches, remnants of deleted programs and duplicate documents accumulate. As a result, the laptop wastes resources processing unnecessary data.

What to do:

  • 🧹 Disk Cleanup: On Windows, open This computer → right click on the disk C: → Properties → Disk Cleanup. Delete temporary files, recycle bin, old restore points.
  • 🗑️ Uninstalling programs: Go to Control Panel → Programs → Uninstall a program. Remove everything you don't use (especially McAfee, Norton, games from Mail.ru).
  • 🔍 Search for duplicates: Use utilities CCleaner (free version) or Duplicate Cleaner to find duplicate files.
  • 📁 Autoload optimization: B Task Manager (Ctrl+Shift+Esc) go to the tab Autoload and disable everything except antivirus and drivers.

☑️ Checklist for cleaning your laptop

Done: 0 / 5

For macOS use the built-in utility Disk Cleanup (in Об этом Mac → Хранилище → Управлять) or third-party programs like CleanMyMac. On Linux clear the package cache with the command:

sudo apt clean && sudo apt autoclean
⚠️ Attention: Don't delete files from folders Windows, Program Files or System32 manually - this can lead to system crash. Use only proven utilities.

3. Optimizing random access memory (RAM)

If the laptop slows down when opening several tabs in the browser or starting Photoshop/AutoCAD, the problem is lack of RAM. Even 8 GB may not be enough for modern tasks.

How to check:

  1. Open Task Manager → tab Performance → Memory.
  2. If in the section Used Constantly 80-90% - not enough memory.
  3. Look at the graph Free: if it is close to zero, it’s time to act.

Solutions:

  • 🔄 Disable unnecessary processes: B Task Manager find programs that “eat up” memory (for example, Telegram, Discord, Steam in the background) and complete them.
  • 🛠️ Use a swap file: Go to Control Panel → System → Advanced system settings → Performance → Settings → Advanced → Virtual memory. Set the paging file size to 1.5–2 times the amount of RAM.
  • 💻 Add RAM: If your laptop has a free slot, buy an additional slot. For office tasks, 16 GB is enough (2x8 GB in dual-channel mode).
  • 🧠 Use ReadyBoost (HDD only): Connect an 8–16 GB flash drive, format it in NTFS, right click → Properties → ReadyBoost → Provide this device.
RAM capacity Suitable tasks Signs of shortage
4 GB Office programs, watching videos Stutters when opening 5+ tabs in the browser
8 GB Easy photoshop, games like GTA V Lags on startup Premiere Pro or Blender
16 GB Video editing, 3D modeling, streaming Lags when rendering or working with large projects
32 GB+ Professional work with After Effects, virtual machines No problems (unless you use 100+ tabs)
💡

If you have a laptop with soldered memory (For example, MacBook Air or Dell XPS), the only way out is to close unnecessary programs or use cloud services like Google Colab for heavy tasks.

4. Check for viruses and malware

Viruses and mining scripts can silently load the processor to 100%, causing the laptop to slow down. Even if you have an antivirus installed, it does not always detect all threats.

How to check:

  • 🛡️ Scan in safe mode: Reboot your laptop while holding F8 (or Shift + Reboot in Windows 10/11). Select Safe Mode with Networking and start scanning.
  • 🔍 Use several antiviruses: Kaspersky Virus Removal Tool, Dr.Web CureIt!, Malwarebytes (free utilities for one-time checking).
  • 🕵️ Check your browser extensions: Mining scripts are often hidden in extensions for Chrome or Firefox. Remove suspicious plugins.
  • 📡 View network activity: B Task Manager on the tab Network Check to see if any program is sending a suspiciously large amount of data.

If the antivirus has found threats but cannot remove them:

  1. Download LiveCD with an antivirus (for example, Kaspersky Rescue Disk).
  2. Write the image to a flash drive using Rufus.
  3. Boot from the flash drive and scan the system.
⚠️ Attention: Some viruses block antiviruses from launching. If you can't open Kaspersky or Dr.Web, rename the utility file (for example, from drweb-cureit.exe on scan.exe).

5. Update drivers and BIOS

Outdated or incorrectly installed drivers are a common cause of slowdowns, especially after updating Windows. For example, if the video card driver NVIDIA or AMD It hasn't been updated in a year, games and videos will slow down.

How to update drivers:

  • 🔧 Automatically: Use Driver Booster or built-in Device Manager (right click on Start → Device Manager, then update the drivers for each device with an exclamation mark).
  • 🖥️ Manually: Download drivers from the manufacturer's official website:
    • NVIDIA: https://www.nvidia.ru/Download/index.aspx
    • AMD: https://www.amd.com/ru/support
    • Intel: https://www.intel.ru/content/www/ru/ru/support/detect.html
  • 🔄 Driver rollback: If the brakes started after the update, return the old version: to Device Manager right click on the device → Properties → Driver → Roll Back.

Update BIOS can solve compatibility problems and speed up work by 10-15%, but this is a risky procedure. If you do something wrong, the laptop may stop turning on.

How to update BIOS safely?

1. Download the firmware from the manufacturer’s official website (for example, for ASUS — https://www.asus.com/support).

2. Connect your laptop to a power source (do not update from battery!).

3. Use the manufacturer's built-in utility (for example, Lenovo Vantage, HP Support Assistant).

4. Do not turn off the laptop and do not interrupt the process!

For macOS no driver updates are required - they are installed automatically via Software update. On Linux use commands:

sudo apt update && sudo apt upgrade

6. Replacing HDD with SSD or disk optimization

If your laptop is equipped hard disk drive (HDD), replacement by SSD will give a speed increase of 5–10 times. The system will boot in 10 seconds, and programs will open instantly.

How to choose an SSD:

  • 💾 Form factor: Suitable for most laptops 2.5" SATA (For example, Samsung 870 EVO or Crucial MX500). For ultrabooks - M.2 NVMe (For example, WD Black SN850X).
  • 📏 Volume: Minimum 256 GB (for the system and programs), optimally 512 GB–1 TB (if you store files on a laptop).
  • ⚡ Speed: For SATA - up to 550 MB/s, for NVMe - from 3000 MB/s.

If it is not possible to replace the disk, optimize the current one:

  • 🔄 Defragmentation (only for HDD!): On Windows, open This PC → Disk Properties → Tools → Optimize.
  • 🗃️ Cleaning up unnecessary files: Remove movies, games and programs you don't use.
  • 🛠️ Error checking: On the command line (Win + R → cmd) enter:
chkdsk C: /f /r

(Replace C: to your drive letter.)

💡

Replacing an HDD with an SSD is the most effective upgrade for an old laptop. Even budget Kingston A400 240 GB will speed up work by 3-5 times.

7. Overheating: cleaning from dust and replacing thermal paste

If laptop starts to slow down after 10–30 minutes of operation and at the same time it gets very hot, the problem is overheating. Dust clogs the ventilation holes, and dried thermal paste does not remove heat from the processor.

Signs of overheating:

  • 🌡️ The laptop becomes hot in the keyboard area or below.
  • 🔊 The cooler operates at maximum speed all the time.
  • ⚡ Performance drops (processor throttling - reduces frequency).

How to clean your laptop:

  1. Turn off the laptop and disconnect the battery (if it is removable).
  2. Unscrew the back cover (you need a Phillips screwdriver).
  3. Carefully blow off dust from the cooler and radiator with a can of compressed air (do not use a vacuum cleaner!).
  4. Remove the cooler, clean it from dust and lubricate the bearing silicone grease.
  5. Remove old thermal paste from the processor and video card with a cotton swab dipped in alcohol.
  6. Apply new thermal paste (eg Arctic MX-4 or Noctua NT-H1) in a thin layer.
⚠️ Attention: If you have never disassembled a laptop, it is better to contact a service center. Incorrect assembly may damage the cables or motherboard.

To monitor temperature use:

  • 📊 Windows: HWMonitor, Core Temp, Speccy.
  • 🍎 macOS: iStat Menus.
  • 🐧 Linux: 
    sensors
    (install via 
    sudo apt install lm-sensors
    ).

8. System reset or reinstallation of Windows

If none of the above helps, your last chance is reset the system to factory settings or a clean reinstall of Windows. This will remove all accumulated errors, viruses and junk.

How to reset Windows 10/11:

  1. Open Settings → Update & Security → Recovery.
  2. Click Start under the item Restore your computer to its original state.
  3. Select Save my files (if you don’t want to lose documents) or Delete everything (full reset).
  4. Follow the instructions (takes about 30-60 minutes).

For clean install of Windows:

  1. Download Media Creation Tool from the Microsoft website.
  2. Create a bootable USB flash drive (minimum 8 GB).
  3. Boot from the flash drive (in the BIOS, select it as the first boot device).
  4. Delete all partitions on the disk and install Windows on the unallocated area.

After reinstallation:

  • 🔑 Install all drivers from the official website of the laptop manufacturer.
  • 🛡️ Activate your antivirus (Kaspersky, Bitdefender or built-in Windows Defender).
  • 🔄 Disable Windows telemetry (via ShutUp10 or manually in Settings → Privacy).
💡

Reinstalling Windows solves 90% of software problems with brakes, but does not help with hardware faults (for example, a worn out HDD or faulty RAM).

FAQ: Answers to frequently asked questions

🔹 The laptop slows down only in games - what to do?

Most likely the problem is with the video card drivers or overheating. Update drivers via GeForce Experience (for NVIDIA) or Adrenalin (for AMD). Check GPU temperature using MSI Afterburner - if it is above 85°C, clean the laptop from dust.

🔹 Why does my laptop slow down after updating Windows?

Updates often break driver compatibility. Try:

  1. Roll back update to Settings → Update & Security → Windows Update → View update history → Uninstall updates.
  2. Update drivers manually (especially chipset and video card).
  3. Restore an old version of Windows via a restore point.
🔹 The laptop is slow on Linux - what's the matter?

On Linux, slowdowns are often associated with:

  • Incorrectly selected video card driver (try proprietary drivers from NVIDIA or AMD).
  • Too "heavy" desktop environment (replace GNOME on XFCE or LXQt).
  • The absence of a swap file (create it with the command 
    sudo fallocate -l 4G /swapfile
    ).
🔹 Is it possible to speed up a laptop without replacing components?

Yes, if the problem is software. Try:

  • Disable visual effects in Windows (Control Panel → System → Advanced Settings → Performance → Settings → Get better performance).
  • Use lightweight program analogues (for example, LibreOffice instead of Microsoft Office, Paint.NET instead of Photoshop).
  • Increase the swap file to 1.5–2 RAM volumes.
🔹 When is it time to take your laptop to service?

Contact the service center if:

  • Laptop won't turn on or turns off a few seconds after starting.
  • appear on the screen artifacts (strips, flickering, distortion).
  • The hard drive is beeping clicking or grinding noises (a sign of physical wear).
  • Laptop overheats up to 100°C even after cleaning.

In these cases, DIY repairs may make the problem worse.