Did you click on a program shortcut and the laptop froze for a minute with the cursor spinning? Or does the system respond to clicks with a delay of several seconds, as if it is “thinking” about each action? Such symptoms are familiar to most users, but not everyone knows what exactly causes these delays. In 80% of cases, the problem is solved without visiting a service center - just understand its source.

In this article we will look at all possible reasons, due to which the laptop begins to “slow down” - from banal overheating to hidden viruses in the system. You will learn how diagnose the problem using built-in Windows/macOS/Linux tools, which BIOS settings can affect performance, and when you really should think about replacing components. And at the end - a checklist for a quick test of your device.

1. Overheating: why the laptop “thinks” under load

The most common cause of freezes is overheating of the processor or video card. When the temperature exceeds a critical level (usually 90–100°C), the system automatically reduces frequencies (throttling) to prevent damage. As a result, the laptop begins to “slow down” even during simple tasks, like opening a browser.

How to check the temperature?

  • 🔥 Windows: use utilities HWMonitor, Core Temp or Speccy (shows temperature in real time).
  • 🍎 macOS: open System monitoring (in the folder Utilities) or install iStat Menus.
  • 🐧 Linux: run the command 
    sensors | grep 'Core'
    in the terminal.

Normal values:

  • 🟢 30–50°C - ideal (no load).
  • 🟡 60–80°C — acceptable under load (games, rendering).
  • 🔴 90°C+ - critical overheating, requires intervention.
⚠️ Attention: If the processor temperature jumps to 100°C when watching a video - this is a sign dried thermal paste or a cooling system clogged with dust. In such a case, the laptop may turn off suddenly to avoid damage.
📊 How often do you clean your laptop cooling system?
  • Once every 3–6 months
  • Once a year
  • Only when it starts to warm up
  • Never

2. Lack of random access memory (RAM): symptoms and solutions

If the laptop “thinks” when opening several browser tabs or launching programs, the culprit is insufficient RAM. Modern applications (especially Chrome, Photoshop, Visual Studio) can consume 1–2 GB RAM each. When there is not enough memory, the system starts using swap file on the hard drive - and this is in 10–100 times slowerthan RAM.

How to check memory usage?

  • 🪟 Windows: click Ctrl+Shift+Esc → tab Performance → Memory.
  • 🍏 macOS: System monitoring → tab Memory.
  • 🐧 Linux: team 
    free -h
    .
RAM capacity Minimum tasks Recommended tasks Signs of shortage
4 GB Office programs, 1–2 browser tabs Not suitable for modern tasks Constant freezing, slow switching between windows
8 GB 10+ tabs, easy photo editing, simple games Optimal for most users Slowdowns when working with AutoCAD or video
16 GB+ Multitasking, gaming, rendering, virtual machines For professionals and gamers Problems unlikely

Solutions:

  • 🔄 Close unnecessary programs (especially browser tabs - each can “eat up” up to 500 MB RAM).
  • ⚡ Disable startup unnecessary applications (in Task Manager → Autoload).
  • 💾 Add RAM (if the laptop supports the upgrade).
  • 🖥️ Use SSD — the page file on it works faster than on the HDD.
💡

In Windows 10/11, you can manually increase the page file: Control Panel → System → Advanced system settings → Performance → Settings → Advanced → Virtual memory. The recommended size is 1.5–2× of the RAM capacity.

3. Hard disk (HDD) vs SSD: why old laptops “slow down”

If your laptop was released before 2015, it most likely has hard disk (HDD) - a mechanical device with rotating plates. Even in ideal condition, the HDD works in 5–10 times slowerthan modern SSD. This is noticeable when:

  • 🐢 System boot (HDD: 30–60 seconds, SSD: 5–10 seconds).
  • 📁 Opening large folders with files.
  • 🎮 Launching games or heavy programs (for example, Adobe Premiere).

How to check disk type?

  • 🪟 Windows: Win + R → enter msinfo32 → find the line Disk type.
  • 🍏 macOS: About this Mac → System report → Storage.

If you have a HDD, replacing it with an SSD will give biggest performance gain among all the upgrades. For example, after installation Samsung 870 EVO or Crucial MX500 The laptop will turn on in seconds, and programs will open instantly.

⚠️ Attention: When replacing HDD with SSD in laptops with Optane Memory (Intel technology) you may need to disable it in the BIOS, otherwise the system will not see the new drive.

Unplug the laptop and remove the battery (if removable)

Download the Windows/macOS image to a USB flash drive for a clean installation

Transfer important data to an external drive

Prepare a screwdriver and adapter (if needed for cloning)

Check SSD compatibility with your laptop model (size: 2.5" or M.2)-->

4. Viruses and malware: hidden system “brakes”

It's unlikely that your laptop is infected cryptocurrency miners or spyware, but even “harmless” viruses can:

  • 🕵️‍♂️ Consume CPU resources in the background (for example, to send spam).
  • 📡 Load network, slowing down the Internet and updates.
  • 🔄 Modify system files, causing errors and freezes.

How to check the system?

  • 🛡️ Windows Defender: Start → Settings → Update & Security → Windows Security → Virus Protection.
  • 🔍 Additional scanners: Malwarebytes, Kaspersky Virus Removal Tool, Dr.Web CureIt!.
  • 🐧 Linux: 
    sudo apt install clamav && freshclam && clamscan -r /

Signs of infection:

  • 🚨 Unexpected pop-ups (especially with advertisements).
  • 📉 A sharp increase in CPU/GPU usage for no apparent reason.
  • 🔌 The laptop heats up and “slows down” even in standby mode.
How to remove a miner if the antivirus does not see it?

1. Open Task Manager and sort processes by CPU usage.

2. Look for suspicious processes (for example, svchost.exe with high load or unknown names).

3. Right click → Open file storage location → delete the file manually.

4. Check startup (msconfig or taskmgr) and disable suspicious tasks.

5. Use Process Explorer from Microsoft for in-depth analysis.

5. Disk fragmentation and junk files: how they affect speed

Appears on HDDs over time fragmentation - when files are split into parts and written in different places on the disk. To read them, the HDD head has to “jump” on the platter, which slows down the work. On SSD, fragmentation is not so critical, but junk files (cache, temporary data) take up space and can slow down the system.

How to clean a disk?

  • 🧹 Windows: Disk Cleanup (type in search) → select drive C: → delete temporary files, trash, old updates.
  • 🗑️ CCleaner: deep cleaning utility (caution - do not delete files Prefetch, they speed up the launch of programs!).
  • 🔄 Defragmentation (only for HDD!): Disk optimization → select drive → Optimize.
  • 🍎 macOS: About the program → Storage → Management → delete unnecessary files.

Also check folders that tend to grow large:

  • 📁 C:\Users\<Name>\AppData\Local\Temp - temporary files.
  • 📁 C:\Windows\SoftwareDistribution\Download - Windows update cache.
  • 📁 ~/Library/Caches (macOS) - application cache.
💡

Do not use defragmentation on the SSD - this will shorten its service life! For SSDs, the standard TRIM command is sufficient (in Windows it is executed automatically).

6. Outdated drivers and hardware conflicts

Drivers are “translators” between hardware and the operating system. If they are out of date or damaged, the laptop may:

  • 🖱️ “Freeze” when connecting a mouse or flash drive.
  • 🎮 Produce artifacts in games or slow down when playing videos.
  • 🔊 Do not play sound or do it with a delay.

How to update drivers?

  • 🔧 Automatic (Windows): Start → Settings → Update & Security → Windows Update → View additional updates.
  • 🌐 Manually: download drivers from the laptop manufacturer's website (Dell, HP, Lenovo etc.) or chipset (Intel, AMD, NVIDIA).
  • 🛠️ Using utilities: Driver Booster, Snappy Driver Installer (use with caution - some programs install unnecessary software!).

Pay special attention to drivers:

  • 🖥️ Video cards (NVIDIA GeForce, AMD Radeon, Intel HD Graphics).
  • 🔌 Chipset (For example, Intel Management Engine).
  • 📶 Wi-Fi/Bluetooth (often cause freezes when connecting to the network).
⚠️ Attention: If, after updating the driver, the laptop began to work worse (for example, artifacts appeared on the screen), roll back to the previous version: in Device Manager select device → Properties → Driver → Roll Back.

7. BIOS/UEFI settings: hidden parameters that affect performance

The BIOS (or its modern version, UEFI) controls the “low-level” settings of the laptop. Incorrect settings can artificially limit performance. For example:

  • ⚡ Turbo Boost disabled (Intel/AMD technology for processor overclocking).
  • 🔋 Power Saving Mode, which limits CPU/GPU frequencies.
  • 🖥️ Wrong download priority (the laptop tries to boot from the network or USB instead of SSD).

How to get into the BIOS?

  • 🪟 Windows: restart your laptop and click F2, Del, Esc or F12 (depending on the model).
  • 🍎 macOS: hold Option (Alt) when turned on.

What settings should I check?

Parameter Recommended value What happens if it's wrong
Turbo Boost Enabled The processor does not overclock under load
Hyper-Threading Enabled Loss of multi-threaded performance
Secure Boot Enabled (if using Windows 10/11) OS boot problems
SATA Mode AHCI (not IDE!) SSD will be slower

If you are not sure about the settings, reset BIOS to factory settings (Load Default Settings) and check the performance.

8. Hardware problems: when is it time to take your laptop to a service center?

If you have tried all the software methods, but the laptop still “thinks”, the problem may be gland. Here are the signs of hardware problems:

  • 🔋 Battery: The laptop only works on mains power, although the battery shows charge. Or suddenly turns off when the power is turned off.
  • 💾 Hard drive: clicking or grinding noises are heard (a sign bad sectors).
  • 🖥️ RAM: blue screens of death (MEMORY_MANAGEMENT), random reboots.
  • 🔥 Processor/video card: artifacts on the screen, the laptop turns off due to overheating even after cleaning.

How to check hardware?

  • 💽 HDD/SSD test: CrystalDiskInfo (shows disk status) or Victoria (deep check).
  • 🧠 RAM test: MemTest86 (runs from a flash drive, tests memory for errors).
  • 🎯 CPU/GPU stress test: Prime95 (processor), FurMark (video card).
⚠️ Attention: If during the test MemTest86 errors appear - this is a 100% sign of faulty RAM. In this case, the RAM module needs to be replaced, otherwise the laptop will continue to glitch and crash.

If diagnostics show problems with the hardware, it is better to contact service. For example, replacement capacitors on the motherboard or resoldering video card chip requires special equipment.

💡

Before visiting the service, make a backup copy of your data! Even if the problem seems minor, there is a risk of losing information during repairs.

FAQ: Frequently asked questions about laptop brakes

❓ The laptop began to slow down after updating Windows. What to do?

Revert to the previous OS version: Settings → Update & Security → Recovery → Go back to a previous version of Windows. If this is not possible, try:

  1. Roll back drivers (especially video cards).
  2. Disable unnecessary services (msconfig → Services).
  3. Perform a clean installation of Windows (saving files).
❓ Why does my laptop slow down when connected to Wi-Fi?

Possible reasons:

  • 📡 Outdated Wi-Fi adapter driver (update on the manufacturer’s website).
  • 🔌 Conflict with other devices (try changing the channel in the router).
  • 🛡️ Virus using the network (check Task Manager for suspicious processes).
  • 📶 Weak signal (connect to a 5 GHz network instead of 2.4 GHz).
❓ How to speed up an old laptop without upgrading?

Optimize your system as much as possible:

  1. Install Linux (For example, Xubuntu or Linux Mint) - it is less demanding on resources.
  2. Turn off visual effects in Windows (Settings → Accessibility → Transparency effects).
  3. Use easy program analogues: LibreOffice instead of Microsoft Office, Paint.NET instead of Photoshop.
  4. Add readyboost (if you have a flash drive): Disk Properties → ReadyBoost.
❓ The laptop slows down when playing games, although the characteristics are good. What's the matter?

Check:

  • 🔥 Throttling: use ThrottleStop (for Intel) or Ryzen Controller (for AMD) to track the decrease in frequencies.
  • 🎮 Graphics settings: turn it off in games vertical sync and lower the resolution.
  • 🔌 Food: Connect the laptop to the network - performance is often limited on the battery.
  • 🖥️ Drivers: install the latest versions from the site NVIDIA/AMDrather than through Windows Update.
❓ Can an antivirus slow down a laptop?

Yes, especially if it's Kaspersky, Norton or Avast in full protection mode. Try:

  • 🛡️ Disable background scanning in the antivirus settings.
  • 🔍 Replace with a light antivirus: Windows Defender (built-in) or Bitdefender (in “Game Profile” mode).
  • ⚡ Add exceptions for frequently used programs.

If your laptop starts working faster after removing the antivirus, try ESET NOD32 — it is less resource-intensive.