The laptop works very slowly and “thinks” - what to do in 2026?

Your laptop has started to slow down like the old one Pentium 4? Freezes when opening the browser, moments of “thinking” before launching the program, and sometimes a completely “frozen” picture with a spinning cursor? This is not a death sentence - in 90% of cases the problem can be solved without purchasing a new device. The reasons for slow operation can be both software (clogged system, viruses, fragmentation) and hardware (overheating, drive wear, lack of RAM). In this article we will analyze step-by-step diagnostic methods and eliminating brakes for Windows 10/11, macOS And Linux, and we’ll also tell you when it’s time to take your laptop to a service center.

First, let’s determine what exactly is “slowing down”: the entire system or individual programs? For example, if Google Chrome opens in 10 seconds, and Notepad++ - instantly, the problem is most likely in the browser or lack of RAM. If the laptop “thinks” even when moving the window across the screen, the video card, drivers, or overheating are to blame. We have compiled checklist of priority actions, starting with the simplest ones and ending with “heavy artillery” like reinstalling the OS.

1. Diagnostics: why did the laptop become slow?

Before you fix anything, you need to understand root of the problem. Slow performance can be caused by a dozen reasons - from a clogged cache to a dying hard drive. Let's start with a basic check:

• 🔍 CPU and RAM load: open Task Manager (Ctrl+Shift+Esc) and see which processes are “eating” resources. If svchost.exe or Antimalware Service Executable load the CPU by 80% - this is normal during updates, but not all the time.
• 🌡️ Overheating: install the utility HWMonitor or Core Temp. CPU temperature is higher 85°C in idle time or 95°C under load - critical signal (needs cleaning or replacing thermal paste).
• 💾 Drive status: For HDD, check health via CrystalDiskInfo (status Good - the norm, Caution or Bad - it's time to run to the service). For SSD, see parameter Total Host Writes — if it is close to the disk resource, the recording speed will drop significantly.
• 🦠 Viruses and malware: even if you have an antivirus, run a scan Malwarebytes or Kaspersky Virus Removal Tool. Some mining bots disguise themselves as system processes.

Critical point: if the laptop slows down even in the BIOS (before loading the OS), the problem is definitely a hardware one - most likely the drive or RAM is faulty. In this case, no software methods will help.

2. Quick ways to speed up your laptop (without installing programs)

If the reason for the brakes is not in the hardware, start with these actions - they take 10-15 minutes and often give an instant effect:

• 🧹 Cleaning startup: in Task Manager on the tab Autoload disable all programs except antivirus and drivers (for example, NVIDIA GeForce Experience or Realtek Audio you can safely turn it off).
• 🗑️ Deleting temporary files: press Win + R, enter %temp% and delete everything from the folder. Then repeat with temp (without %) and prefetch.
• 🔄 Restarting Explorer: if it is the Windows interface that is slowing down, open Task Manager, find the process Explorer, press Restart.
• 🖥️ Disabling visual effects: go to Settings → System → About the system → Advanced system settings → Performance and select Provide the best performance.

For macOS similar steps: clearing cache via ~/Library/Caches, disabling unnecessary login elements System Settings → Users and Groups → Login Items, and reset SMC/NVRAM (instructions for your model MacBook search on the Apple website).

3. Deep cleaning of the system: what can be removed without risk?

Over time, digital garbage accumulates on the laptop: old drivers, program caches, duplicate files and “tails” from long-deleted software. Here's what you can safely remove:

File type	Where to look	How to clean
Browser cache	C:\Users\Username\AppData\Local\Google\Chrome\User Data\Default\Cache	Delete everything from the folder or use CCleaner (just don't clear your cookies if you don't want to lose your saved passwords!).
Old restore points	Control Panel → Recovery → Set up system recovery	Click Customize, then Delete all points except the last one.
Unnecessary languages and fonts	Settings → Time and language → Region and language	Remove all languages except the one you are using. Fonts are cleaned via Control Panel → Fonts.
Duplicate files	Entire disc C: And D:	Use Duplicate Cleaner or Auslogics Duplicate File Finder.

Attention! Don't manually delete files from folders System32, WinSxS or Program Files - this can break the system. For deep cleaning, it is better to use specialized utilities:

• 🛠️ BleachBit (analogue CCleaner, but without advertising and more aggressive cleaning).
• 🧼 Wise Disk Cleaner — removes garbage even from the registry.
• 🗃️ TreeSize — shows which folders take up the most space.

What happens if you delete the WinSxS folder?

This folder contains Windows components for updates and recovery. Clearing it manually will make it impossible to install updates or roll back the system. To safely reduce its size, use the command Dism.exe /Online /Cleanup-Image /AnalyzeComponentStore on the command line as administrator.

4. Optimizing your hard drive and switching to SSD

If your laptop is still running on HDD (not on SSD), this is the main reason for the brakes. Even a new HDD is 10 times slower than the cheapest SSD. Here's what you can do:

• 🔄 Defragmentation (only for HDD!): open Disk optimization (search through Windows search) and run the analysis. If fragmentation is greater 10%, perform defragmentation.
• 🚀 Enabling TRIM for SSD: on the command line (Win + R → cmd → Enter) enter:

  fsutil behavior query DisableDeleteNotify

  If the result 0, TRIM is enabled. If 1, activate with the command:

  fsutil behavior set DisableDeleteNotify 0

• 💿 Transferring the system to SSD: If you have an HDD, the best investment is to buy an SSD (even Samsung 870 EVO for 500 GB it costs ~5000₽). To clone use Macrium Reflect or Clonezilla.

Important for macOS owners: if you have MacBook with Fusion Drive (hybrid HDD+SSD), dividing it into separate disks can increase speed. But this is a risky operation - it is better to contact the service.

5. Problems with RAM and virtual memory

Lack of RAM is one of the most common causes of slowdowns. If you have 4 GB or less, Windows will constantly use swap file, which greatly slows down the work. Here's how to check and fix:

• 📊 Checking RAM Usage: in Task Manager on the tab Performance look at the chart Memory. If it constantly “rests” at 80-90%, there is not enough memory.
• 🔧 Setting up the swap file:
  1. Open Control Panel → System → Advanced system settings → Performance → Settings → Advanced → Virtual memory.
  2. Uncheck Automatically select the size of the paging file.
  3. Select drive C:, please indicate Specify size: Initial – 1.5×RAM, Maximum - 3×RAM (for example, for 8 GB RAM: 12288 MB and 24576 MB).

🆙 Adding RAM: If your laptop has a free slot, buy another slot. For most models (Acer Aspire 5, Lenovo IdeaPad) that's enough 8 GB DDR4 (costs ~3000₽).

⚠️ Attention: if you saw in Task Manager process Memory Compression, which loads the CPU by 20-30% - this is a sign of an acute lack of RAM. In this case, the paging file will not help; you need to urgently add physical memory.

6. Viruses, mining and hidden threats

Even if you have an antivirus installed, some viruses can bypass protection. Particularly dangerous:

• 🕵️ Miners: use your CPU/GPU to mine cryptocurrency. Signs: the laptop heats up and slows down even when idle, the fan runs at maximum.
• 📤 Spyware: programs like Keylogger or Adware they steal data and show advertisements, loading the system.
• 🦹 Rootkits: they are embedded in the OS kernel and disguised as system processes (for example, lsass.exe with unusual resource consumption).

How to check and remove:

1. Download Kaspersky Rescue Disk and write it to a flash drive. Boot from it (in BIOS select boot from USB) and scan the system - this will even find hidden viruses.
2. Check network activity: open Resource Monitor (Win + R → resmon) and see what programs are using the Internet. Unknown IP addresses or suspicious connections are a sign of infection.
3. Use Process Explorer (from Microsoft) for process analysis. If you see svchost.exe with an unusual description or location is a virus.

Critical information: if after cleaning the viruses the laptop still slows down, check the hosts file (C:\Windows\System32\drivers\etc\hosts). If there are strange entries there (for example, redirects to unknown IPs), delete them and save the file.

7. When is it time to take your laptop to a service center?

If you have tried everything in this article and the laptop still works like 286th Pentium, the problem is most likely hardware. Here are signs that you need professional help:

• 🔥 Constant overheating (even after cleaning and replacing thermal paste). Possible reasons: cooler malfunction, cracks in the radiator, drying out of thermal pads on the chipset.
• 💥 Blue screens of death (BSOD) with errors IRQL_NOT_LESS_OR_EQUAL, MEMORY_MANAGEMENT or CRITICAL_PROCESS_DIED - a sign of problems with the RAM or motherboard.
• 🛑 Laptop turns off by itself (especially under load) - the battery or power supply may be faulty.
• 🐢 Slow even in BIOS - this is 100% a problem with the drive (HDD/SSD) or RAM.

Service repair cost:

Problem	Average price (₽)	Repair period
Replacing thermal paste + cleaning	1500–3000	1 day
Replacing HDD with SSD	5000–10000 (with storage)	1–2 days
Adding RAM	3000–6000 (per 8 GB stick)	30 minutes
Motherboard diagnostics	1000–2000	2–3 days

⚠️ Attention: If the laptop is more than 5 years old, it is sometimes cheaper to buy a new one than to repair the old one. For example, replacing the motherboard with ASUS ROG Strix may cost 20 000₽+, whereas new Acer Nitro 5 with similar characteristics will cost 60 000₽.

FAQ: Frequently asked questions about laptop brakes

❓ Why does my laptop slow down after updating Windows?

Updates often bring new bugs, especially if you have old hardware. Try:

1. Roll back the update: Settings → Update & Security → Windows Update → View update history → Uninstall updates.
2. Disable automatic driver updates: Control Panel → System → Advanced system settings → Hardware → Device installation options → select No.

If the brakes started after a major update (for example, a transition from Windows 10 on 11), check your laptop's compatibility on the Microsoft website.

❓ Is it possible to speed up a laptop with 2 GB of RAM?

Technically yes, but it would be like "resuscitating a patient." Minimum actions:

• Install Linux Lite or AntiX — these distributions run on 1–2 GB of RAM.
• Disable all visual effects and background services.
• Use lightweight programs: Pale Moon instead of Chrome, Abode Reader instead of Foxit PDF.

But honestly: it’s impossible to work comfortably with 2 GB of RAM in 2026. It’s better to buy an additional stick up to at least 4 GB.

❓ Why does the laptop slow down when connecting to the Internet?
Probable reasons:
• 🔄 Automatic update Windows or antivirus (check Task Manager on the process svchost.exe with high network load).
• 🕵️ Mining bot or a virus using your traffic (scan the system Malwarebytes).
• 📡 Problems with the router: Try connecting to a different network or reboot your router.
• 📥 Background loading (For example, Steam or uTorrent may limit system speed).
❓ How to check if my SSD is dying?

Use CrystalDiskInfo and pay attention to these parameters:

• Reallocated Sectors Count — if the value > 10, the disk begins to “crumble”.
• Uncorrectable Error Count - any value > 0 bad sign.
• Total Host Writes - if it is close to TBW (disk resource specified in the specifications), the recording speed will drop.

For macOS use DriveDX or built-in utility diskutil list in Terminal.

❓ Should I disable swap files if I have 16 GB of RAM?

No, it's not worth it. The paging file is needed not only to compensate for the lack of RAM, but also for:

• Creating memory dumps during BSOD (without it it will not be possible to analyze the cause of the failure).
• Some professional programs (for example, Adobe Premiere or AutoCAD require a paging file regardless of the amount of RAM).
• System stability during peak loads (for example, if 50 Chrome + game tabs are open at the same time).

Best option: leave the page file size 2–4 GB on the system disk.