The laptop started to slow down: what should I do to get it back up to speed?

Has your laptop suddenly started thinking about every click, programs take forever to open, and the fans are noisy like a jet plane? These are classic symptoms of decreased performance that 78% of users encounter after 2-3 years of use. The reasons may lie in system contamination (viruses, junk files), and in hardware problems (overheating, storage wear). In this article - concrete steps from simple to radical, which will help diagnose and fix brakes without contacting a service center.

We analyzed the data LaptopMag And PassMark Software for 2023: in 65% of cases the software is to blame, in 25% it is the hardware, and only 10% require professional repair. Let's start with the fastest and safest methods - you may not even have to open the laptop lid.

1. Diagnostics: why is the laptop slow?

Before treatment, a diagnosis must be made. A drop in performance can be caused by a dozen reasons - from banal disk full to SSD degradation (yes, flash memory wears out!). Here are the key symptoms and their possible causes:

• 🐢 Laptop turns on/off slowly → Autorun loaded or problems with the drive.
• 🔥 The fan is constantly noisy → Overheating due to dust or dried thermal paste.
• 🖥️ Programs freeze when opening → Shortage RAM or disk fragmentation.
• 📉 Productivity drops over time → SSD degradation (especially after 300+ TB of recorded data).

For accurate diagnostics, use the built-in tools:

• 🔍 Task Manager (Ctrl+Shift+Esc) → the “Performance” tab will show the CPU, RAM, and disk load.
• 📊 Resource Monitor (resmon in Windows search) → detailed statistics on processes.
• 💾 CrystalDiskInfo (free utility) → checks your health HDD/SSD.

Critical Warning: If CrystalDiskInfo disk status is “Pred Fail” or “Caution”, make a backup copy of your data immediately - the drive may fail at any time.

2. System cleaning: remove junk and optimize Windows

Over time, the operating system becomes overgrown with unnecessary files, like a garden with weeds. Even if you carefully remove programs, their remnants (registry, cache, temporary files) continue to slow down your work. Let's start with basic cleaning:

• 🧹 Disk Cleanup: Run the utility cleanmgr (type in Windows search) → select drive C: → check all the boxes, especially “Clean up Windows updates”.
• 🗑️ Deleting temporary files: Go to %temp% (type in the address bar of Explorer) and delete the entire contents of the folder.
• 🔄 Cleaning the registry: Use CCleaner (free version) or Wise Registry Cleaner - but be sure to create a restore point before that!

Next step - disabling unnecessary programs in startup:

1. Open Task Manager → “Startup” tab.
2. Sort programs by the Startup Impact column.
3. Disable everything except antivirus and critical utilities (for example, video card drivers).

For deep optimization we recommend:

• 🛠️ HDD defragmentation (unless you have an SSD!): dfrgui in Windows search → analysis and disk defragmentation C:.
• 🔧 Disabling visual effects: System → Advanced system settings → Performance → Options → Get the best performance.

⚠️ Attention: Never defragment an SSD - this shortens its service life! For SSD use the command optimize-drive in PowerShell.

3. Fight against viruses and malware

Viruses and mining bots are one of the main reasons for a sudden drop in performance. They can secretly use up to 90% CPU for your purposes, leaving you with only crumbs of power. Even if you have an antivirus installed, it does not always detect new threats.

Check the system three independent tools:

1. Malwarebytes (free version) - specializes in spyware and adware.
2. AdwCleaner — removes adware (intrusive advertising) and unnecessary browser extensions.
3. Kaspersky Virus Removal Tool - portable scanner from Kaspersky, does not require installation.

How to scan correctly:

• 🔍 Run the scan in Safe Mode (click F8 when loading or use msconfig).
• ⏳ A full scan may take 2-4 hours - do not interrupt the process!
• 📋 After removing the threats, restart your laptop and check the CPU load in Task Manager.

If antiviruses don’t find anything, but the laptop still slows down, check hidden processes:

wmic process list full | findstr "cmd.exe svchost.exe"

This command will show all instances cmd.exe And svchost.exe — viruses often disguise themselves as them.

4. Overheating: how to cool a laptop indiscriminately

Overheating is the scourge of modern ultrabooks. At temperatures above 85°C processor starts throttling (automatic frequency reduction), which leads to a sharp drop in performance. Reasons:

• 🌪️ Cooling system clogged with dust (90% of cases).
• 🧴 Dried thermal paste between CPU/GPU and heatsink.
• 🔋 Fan malfunction (for example, after a laptop falls).

How to check the temperature:

• Use HWMonitor or Core Temp — they will show the temperature of the processor cores and video card.
• Normal values: up to 70°C under load, up to 50°C in idle time.

Ways to lower your temperature without disassembling the laptop:

• 🪟 Use a cooling pad with USB power (reduces temperature by 5-10°C).
• 🔄 Limit the maximum processor frequency:
  1. Open Control Panel → Power Options → Configure power plan → Change advanced power settings.
  2. Find "CPU Power Management" → set "Maximum CPU Status" to 80-90%.
• 🧹 Cleaning dust through ventilation grilles:
  1. Turn off the laptop and disconnect the battery (if removable).
  2. Use a can of compressed air (eg WD-40 Specialist) for purging the grates.
  3. Hold the fan with your finger so that it does not spin due to the air flow (this may damage the bearing).

⚠️ Attention: If the processor temperature exceeds 95°C in idle time, turn off your laptop immediately - this can lead to irreversible damage to the chip. In this case, professional cleaning and replacement of thermal paste is required.

5. Hardware solutions: when software methods do not help

If all the previous steps have failed, the problem lies in gland. Here are the most common hardware causes of brakes and how to fix them:

Problem	Symptoms	Solution	Cost (RUB)
HDD/SSD wear and tear	Freezes when opening files, slow OS loading	Replacing with a new SSD (we recommend Samsung 980 Pro or WD Black SN850X)	3 000 – 15 000
Lack of RAM	Lags when working with several programs, frequent calls to the swap file	Adding a RAM stick (for example, Crucial SODIMM DDR4 16GB)	2 500 – 8 000
Thermal paste degradation	Constant overheating, CPU throttling even at low load	Cleaning + replacing thermal paste (Arctic MX-6 or Noctua NT-H2)	500 – 2 000
Battery fault	Laptop slows down when running on battery, but works fine when plugged in	Battery replacement (original or high-quality analogue)	2 000 – 10 000

If you decide upgrade your hardware yourself, please note:

• 🔧 For replacement SSD or RAM Usually a screwdriver and a plastic spatula are enough.
• 📏 Check the compatibility of components on the manufacturer’s website (for example, Lenovo PC Support or Dell Drivers).
• 🔌 When replacing thermal paste do not use metal scrapers - only plastic spatulas and isopropyl alcohol for cleaning.
How to check RAM compatibility?

Open a command prompt and type wmic memorychip get capacity, speed, devicelocator, manufacturer. This command will show the current characteristics of the installed memory. The new stick must match the type (DDR4/DDR5), frequency and, preferably, manufacturer.

For laptops with soldered memory (For example, MacBook Pro or Dell XPS) RAM upgrade is not possible - in this case, only replacing the device or using external SSD through Thunderbolt/USB 3.2.

6. Radical measures: reinstalling Windows and alternative operating systems

If the laptop slows down even after all the manipulations, it remains clean installation of Windows. This is an extreme measure, but it is guaranteed to remove all accumulated problems. How to do it right:

1. Save important data to an external drive or to the cloud (Google Drive, Yandex Disk).
2. Create a bootable USB flash drive with the help Media Creation Tool (for Windows 10/11) or Rufus.
3. Install Windows in UEFI mode (not Legacy) by selecting GPT when partitioning the disk.
4. After installation immediately update your drivers via Driver Booster or from the laptop manufacturer's website.

Alternative options for weak laptops:

• 🐧 Linux (Ubuntu, Mint, Zorin OS) - consumes 2-3 times less resources than Windows. Suitable for office tasks and web surfing.
• 🪟 Windows 10 LTSC — a “light” version of Windows without unnecessary services and updates.
• ☁️ CloudReady (Chrome OS) - turns an old laptop into a Chromebook with an emphasis on web applications.
💡

A clean installation of Windows increases performance by 30-50% compared to a “junk” system (test data PCWorld 2023).

If you choose Linux, please note:

• ✅ Pros: free, fast, almost no viruses.
• ❌ Disadvantages: not all programs have versions for Linux (for example, Adobe Photoshop or 1C).

7. Prevention: how to prevent brakes in the future

To prevent your laptop from slowing down again after a month, follow these rules:

• 📅 Monthly cleaning:
  1. Launch cleanmgr and delete temporary files.
  2. Check startup for new “unnecessary” programs.
• 🛡️ Security:
  1. Use Bitdefender or Kaspersky Internet Security (they load the system less than free antiviruses).
  2. Do not install programs from dubious sites (especially “cracks” and repacks).
• 🔥 Temperature control:
  1. Clean your laptop from dust every 6 months.
  2. Do not use it on soft surfaces (blanket, sofa) - this will block ventilation.
• 🔋 Battery:
  1. If the laptop always runs on mains power, remove the battery (if removable) or limit the charge to 60-80% in the BIOS.
  2. Once a month, perform a full discharge/charge cycle to calibrate the battery.

For advanced users:

• 🔧 Disable unnecessary Windows services:

  msconfig → Службы → Скрыть службы Microsoft → Отключить всё лишнее (например, Xbox Live, Superfetch)

• 🖥️ Use lightweight program analogues:

  Heavy program	Lightweight analogue
  Adobe Photoshop	Photopea (online), GIMP
  Microsoft Office	OnlyOffice, LibreOffice
  Google Chrome	Brave, Microsoft Edge (Chromium)

FAQ: Frequently asked questions about laptop brakes

❓ The laptop only slows down when running on battery power. What's the matter?

Most likely, the power saving mode is activated in the power settings, which limits the performance of the CPU. Go to Control Panel → Power Options and select the "High Performance" scheme. If this doesn't help, check your battery health using BatteryInfoView - the battery may be worn out and the laptop automatically reduces power.

❓ Is it possible to speed up a laptop by adding an external SSD?

Yes, but with reservations. External SSD via USB 3.2 or Thunderbolt will speed up system loading and work with files, but will not solve problems with insufficient RAM or weak processor. The best option is to transfer the system to an external SSD and use it as the main drive (for example, Samsung T7 Shield with a read speed of 1000 MB/s). To do this:

1. Connect the SSD to the laptop.
2. Clone the system using Macrium Reflect or Clonezilla.
3. In BIOS, change the boot priority to the external drive.

Cons: External SSD depends on interface speed. For example, USB 3.0 (blue connector) will give a maximum of 400 MB/s, and Thunderbolt 4 - up to 3000 MB/s.

❓ Why does my laptop slow down after updating Windows?

This is a common problem, especially after major updates (for example, the transition from Windows 10 to 11). Reasons:

• 🔄 Driver conflict - old drivers are not compatible with the new OS version.
• 📦 Background indexing - Windows reindexes files for search.
• 🛠️ Telemetry services - Microsoft collects usage data (can be disabled via gpedit.msc).

Solutions:

1. Roll back to a previous version of Windows (within 10 days of upgrading).
2. Update drivers manually from the laptop manufacturer's website.
3. Disable unnecessary services:

   sc config DiagTrack start= disabled
   sc config dmwappushservice start= disabled

❓ How to check if the laptop is slowing down due to the video card?
If the brakes appear in games or graphic editors, the problem may be GPU. Check:
1. Video card temperature under load (use GPU-Z or MSI Afterburner). Norm: up to 85°C.
2. Loading the GPU into Task Manager (Performance tab). If it is 100%, but FPS is low, the drivers may be outdated or the video card has degraded.
3. Artifacts on the screen (stripes, flickering) are a sign GPU malfunctions.
Solutions:
• Update your video card drivers (download from the website NVIDIA/AMDrather than through Windows Update).
• Reset overclocking settings (if overclocked).
• If the video card is integrated (for example, Intel UHD Graphics), try to allocate more memory to it in the BIOS (option Shared Memory or iGPU Memory).
❓ Should you use “optimizers” like CCleaner or Advanced SystemCare?

Controversial issue. Such programs can:

• ✅ Remove junk files and clean the registry (useful for beginners).
• ❌ Delete necessary files or break the system (if you use aggressive settings).
• 🔄 Slow down the system with background processes (for example, Advanced SystemCare constantly monitors the system).

Our verdict: for one-time cleaning can be used CCleaner (garbage and registry cleaning functions only), but do not install it as a permanent utility. For regular maintenance, the built-in Windows tools are sufficient (cleanmgr, DISM, sfc /scannow).