Has your laptop suddenly started to “think” when you open the browser, but there’s nothing to say about launching heavy programs? The reasons for this behavior may lie in both software failures and hardware problems. But before you take the device to a service center, you should try to solve the problem yourself - in 80% of cases, slowdowns are due to the accumulation of digital garbage, outdated software or suboptimal system settings.

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 really time to think about replacing components. We will pay special attention hidden functions of system utilities that are not written about in standard manuals.

1. RAM overload: how to free up RAM without rebooting

The most common cause of brakes is lack of random access memory (RAM). Modern browsers (eg. Google Chrome or Microsoft Edge) can “eat up” 1-2 GB of memory for each tab, and background processes (like OneDrive, Discord or Skype) quietly absorb the remains. If you have 4-8 GB of RAM installed, the system begins to actively use swap file on the hard drive - and this is 10-100 times slower than working with RAM.

To check RAM load:

  • 🔍 On Windows: press Ctrl+Shift+Esc → open the “Performance” tab → look at the “Memory” graph. If the load exceeds 80%, it’s time to act.
  • 🍎 On macOS: Open System Monitor (Programs → Utilities) → “Memory” tab. Pay attention to the “Memory Pressure” column - if it is red, there is critically low memory.
  • 🐧 On Linux: enter the command in the terminal 
    free -h
    and look at the line used in section Mem.

How to free up RAM without reboot:

  1. Close unnecessary browser tabs (especially those with videos or animations).
  2. Disable background programs: on Windows — through the “Task Manager” (Ctrl+Shift+Esc), on macOS - in “System Monitoring”.
  3. Use lightweight alternatives: instead Chrome try it Brave or Firefox with extensions disabled.
  4. On Windows 10/11 disable unnecessary visual effects: go to Settings → System → About the system → Advanced system settings → Performance → Options → Get the best performance.
📊 How much RAM is installed in your laptop?
  • 4 GB or less
  • 8 GB
  • 16 GB
  • 32 GB or more
⚠️ Attention: If, after closing all programs, the RAM is still loaded at 70%+, check the laptop for viruses (section 3) or the presence of mining bots. Some malware masquerades as system processes, e.g. svchost.exe or WindowsAudioDevice.

2. Cluttered hard drive (HDD/SSD): how to clean the system in 10 minutes

A full hard drive is the second most popular reason for slowdowns. The rule is simple: if on the system disk (C: on Windows or root partition on macOS/Linux) less than 15% of free space remains, performance drops by 2-3 times. This is especially critical for HDD (regular hard drives), since they physically do not have time to process requests.

How to check free space:

  • 🪟 Windows: Open This PC - free space appears under each drive.
  • 🍏 macOS: Click on the disk icon on the desktop → “File” → “Get information”.
  • 🐧 Linux: in the terminal, enter 
    df -h
    and look at the column Use%.

Disk cleaning methods:

Method Windows macOS Linux
Deleting temporary files Disk Cleanup (Win+R → cleanmgr) Cleanup utility in Launchpad → Other 
sudo apt clean
(Debian/Ubuntu)
Clearing browser cache Ctrl+Shift+Del in the browser Command+Shift+Del in the browser Folder ~/.cache
Deleting old restore points Control Panel → Recovery → Set up system recovery Utility Time Machine → “Delete old backups” 
sudo apt autoremove --purge
Find and remove duplicates Programs CCleaner, Duplicate Cleaner Utility Gemini 2 
fdupes -rd /путь/к/папке

☑️ Checklist for disk cleaning

Done: 0 / 5

If after cleaning the disk is still 90%+ full, consider the following options:

  • 🔄 Transfer personal files (photos, videos, documents) to an external drive or to the cloud (Google Drive, Yandex Disk).
  • 🖥️ Replace HDD on SSD - this will speed up the laptop by 3-5 times (more details in section 7).
  • 📁 Use symbolic links to transfer folders (for example, Documents or Desk) to another drive.

3. Viruses and malware: how to check a laptop without an antivirus

Viruses, Trojans and mining bots can not only steal your data, but also load the processor or video card at 100%, which is why the laptop starts to lag even during simple tasks. Classic signs of infection:

  • 🔥 Processor (CPU) is loaded at 80-100% for no apparent reason (checked in the “Task Manager”).
  • 🖥️ The laptop gets hot and makes noise even when idle.
  • 📥 Advertising banners or redirects appear unexpectedly in the browser.
  • 🔌 The battery runs out quickly (mining bots actively use the GPU).

How to check the system without installing antivirus:

  1. Windows Defender (built-in scanner):
    1. Open Windows Security (Start → Settings → Update & Security → Windows Security).
    2. Select Virus & Threat Protection → Quick Scan.
    3. For a deep scan, click “Scan Settings” → “Full Scan” (takes 1-2 hours).
  2. Check via VirusTotal (online):
    1. Go to the site VirusTotal.
    2. Download suspicious files (from folders C:\Users\Your_name\AppData\Roaming or C:\ProgramData).
    3. Wait for the analysis of 70+ antiviruses.
  3. Checking processes manually:
    1. Open Task Manager (Ctrl+Shift+Esc).
    2. Sort processes by load CPU or GPU.
    3. Check for unknown processes via Google search (eg WmiPrvSE.exe high CPU).
How to remove a mining bot manually?

If in the Task Manager you see a process with a name like svchost.exe, WindowsAudioDevice.exe or NVIDIA Containerwhich loads the GPU by 90-100%, do the following:

1. Open Control Panel → Administrative Tools → Task Scheduler.

2. Check tasks with unusual names (for example, At1, At2 or a random set of letters).

3. Delete suspicious tasks and reboot your laptop.

4. Check your folders C:\Users\Your_name\AppData\Roaming And C:\ProgramData for unknown files with the extension .exe or .bat.

⚠️ Attention: Some viruses block the launch of Task Manager or antivirus programs. If you can't open these tools, boot your laptop into safe mode (on Windows - hold Shift when rebooting, on macOS - hold down Shift when turned on). In Safe Mode, viruses will not run and you will be able to remove them.

4. Disk fragmentation and file system errors: when defragmentation helps

If you have installed HDD (regular hard drive, not SSD), over time the files on it fragmented - are broken into small pieces scattered throughout the disk. Because of this, the disk head has to constantly “jump” between sectors, which slows down reading/writing by 5-10 times. On SSD fragmentation is not so critical, but file system errors can occur there too.

How to check and fix:

  • 🪟 Windows:
    1. Open “This PC” → right click on the drive C: → “Properties” → “Service” → “Optimize”.
    2. To check for errors: open a command prompt as administrator (Win+X → Command Prompt (Administrator)) and enter: 
      chkdsk C: /f /r

      (reboot required).

  • 🍎 macOS:
    1. Open Disk Utility (Programs → Utilities).
    2. Select the system drive → click “First Aid” → “Run”.
  • 🐧 Linux:
    1. To check the file system ext4 enter: 
      sudo fsck -f /dev/sdX

      (replace sdX to your section, for example sda1).

    2. For defragmentation (if used btrfs): 
      sudo btrfs filesystem defragment -r /
💡

If you have SSD, defragmentation is not only useless, but also harmful - it shortens the life of the drive. Instead use the command 

optimize-volume -t -v
in PowerShell (as administrator) to optimize TRIM.

After defragmenting or checking the disk, restart your laptop. If the problem was fragmentation, you will notice an improvement after the first start. If not, move on to the next section.

5. Outdated software and drivers: how to update everything in 5 minutes

Outdated drivers or operating system can cause hardware conflicts that cause your laptop to run slowly. This especially applies to:

  • 🖥️ Video card drivers (NVIDIA, AMD, Intel).
  • 🔊 Sound card drivers (Realtek, Dolby).
  • 📶 Wi-Fi/Bluetooth drivers.
  • 🖨️ Printer drivers and other peripheral equipment.

How to update drivers and system:

Component Windows macOS Linux
Operating system Settings → Update & Security → Windows Update System settings → Software update 
sudo apt update && sudo apt upgrade -y
(Debian/Ubuntu)
Video card drivers Download from the site NVIDIA/AMD/Intel or through GeForce Experience/AMD Adrenalin. Updates via Software update. 
sudo ubuntu-drivers autoinstall
Wi-Fi/Bluetooth drivers Through "Device Manager" (Win+X → Device Manager) → update the driver. Updates via Software update. 
sudo lshw -c network
(check current drivers).
BIOS/UEFI Download from the laptop manufacturer's website (for example, Lenovo, HP, Dell). Via Software update (for MacBook). Depends on the motherboard (usually via fwupd).
💡

Updating the BIOS/UEFI can solve hardware compatibility issues, but if installed incorrectly it will lead to laptop breakdown. Do this only if you are confident in your actions or follow the manufacturer's official instructions.

After updating the drivers, restart your laptop. If the brakes are due to outdated software, the problem should go away. If not, check the power consumption settings (section 6).

6. Incorrect power consumption settings: why the laptop slows down on battery power

Many users do not know that power consumption mode directly affects performance. By default, when running on battery, Windows and macOS limit processor power to conserve battery power. As a result, the laptop can work 2-3 times slower than when connected to the network.

How to check and change settings:

  • 🪟 Windows 10/11:
    1. Open Settings → System → Power & Sleep.
    2. Select the "High Performance" plan (if it is not there, click "Advanced power options" → "Create power plan").
    3. For fine tuning: Control Panel → Power Options → Set up power plan → Change advanced power settings. Install:
      • Minimum processor state: 100%.
      • Maximum processor state: 100%.
      • System cooling mode: Active.
  • 🍎 macOS:
    1. Open System Preferences → Energy Saver.
    2. Uncheck “Dim the display slightly when running on battery power.”
    3. Set "Optimize Video Streaming" to "On" (this will speed up video playback).
  • 🐧 Linux:
    1. Install TLP for energy management: 
      sudo apt install tlp tlp-rdw
    2. Run with settings for maximum performance: 
      sudo tlp set --cpu-scaling-governor=performance

Also check if your laptop is overheating. If the processor temperature exceeds 80°C (can be checked via HWMonitor on Windows or iStat Menus on macOS), turn on active cooling or clean the cooling system from dust.

💡

If you often run on battery power but need maximum performance, buy powerbank with support PD (Power Delivery). Modern laptops (eg. MacBook Pro or Dell XPS) when connected to such a powerbank, they automatically switch to high performance mode.

7. Hardware problems: when it’s time to change components

If all software methods have been tried, but the laptop still slows down, the problem may lie in hardware. Here are the key signs of component wear:

  • 💾 Hard disk (HDD):
    • The laptop freezes for 10-30 seconds when opening files or launching programs.
    • Clicking or grinding noises are heard from the housing.
    • SMART disk status shows errors (checked via CrystalDiskInfo on Windows or smartctl on Linux/macOS).
  • 🔋 Battery:
    • The laptop turns off when disconnected from the network, even if the charge shows 20-30%.
    • Battery life has been reduced to 30-60 minutes.
  • 🌡️ Cooling system:
    • The laptop overheats and automatically reduces performance (throttling).
    • The cooler makes noise at maximum speed, but the temperature does not drop.
  • 🖥️ Random access memory (RAM):
    • Blue screens of death appear (BSOD) with errors like MEMORY_MANAGEMENT.
    • The laptop randomly restarts or shuts down.

What you can do:

Problem Solution Cost (approx.)
HDD wear Replacement with SSD (For example, Samsung 870 EVO or Crucial MX500). 3 000 — 8 000 ₽
Lack of RAM Adding a memory bar (for example, from 4 GB to 8-16 GB). 2 000 — 6 000 ₽
Overheating Cleaning dust + replacing thermal paste (for example, Arctic MX-4). 500 — 2 000 ₽
Battery wear Replacement battery (original or high-quality analogue). 2 000 — 10 000 ₽
Weak processor/video card Buying a new laptop (upgrade is possible only in some models). From 30,000 ₽
⚠️ Attention: If you decide to replace HDD on SSD, don't just clone the system from the old drive to the new one. It’s better to install Windows/macOS “from scratch” - this will save you from accumulated digital garbage and speed up your work by 20-30%. Use the cloud or external storage to transfer personal files.

8. Alternative solutions: when all else fails

If you've tried all the methods and your laptop is still slow, consider these options:

  • 🪟 Reinstalling Windows:
    1. Download the official image from the website Microsoft (link).
    2. Create a bootable USB flash drive using Rufus or Media Creation Tool.
    3. Install the system “cleanly”, without saving old files.
  • 🐧 Installing a lightweight OS:
    • For weak laptops (2-4 GB RAM): Linux Mint Xfce, Lubuntu or AntiX.
    • For mid-range laptops (4-8 GB RAM): Ubuntu or Fedora with GNOME.
    • For macOS: installation ChromeOS through CloudReady (if the laptop does not support the latest versions of macOS).
  • ☁️ Using cloud solutions:
    • For office tasks: Google Docs, OnlyOffice.
    • For graphics: Figma, Photoshop Online.
    • For programming: GitHub Codespaces, Replit.
  • 🔄 Upgrade via external devices:
    • Connect external SSD by USB 3.0/Thunderbolt and install the system on it.
    • Use an external video card (eGPU) to speed up graphics (for example, Razer Core).
    • 💡

    If your laptop is older than 5-7 years, don't waste money on an upgrade. It is often more profitable to buy a new model (for example, Lenovo ThinkPad or MacBook Air M1) than trying to “reanimate” old hardware. Compare the cost of repair and new device before making a decision.

    FAQ: Frequently asked questions about laptop slowness

    The laptop only slows down when playing games. What to do?

    If the brakes appear only in games, the problem is most likely in:

    • 🎮 Video card: update drivers (NVIDIA GeForce Experience or AMD Adrenalin).
    • 🔥 Overheating: check the temperature through MSI Afterburner or HWMonitor. If the GPU gets hotter 85°C, clean the laptop from dust.
    • ⚙️ Graphics settings: Lower the resolution, turn off anti-aliasing and shadows.
    • 🖥️ Lack of RAM: close background programs before starting the game.

      • If the laptop is older than 5 years, perhaps its video card simply cannot handle modern games. Check the game's minimum requirements on the developer's website.

    Laptop runs slowly after Windows update. How to roll back?

    If the brakes started after the update, try:

    1. Roll back to previous version:
      1. Open Settings → Update & Security → Recovery.
      2. Click "Get Started" under "Return to Previous"