The laptop keeps rebooting: reasons and solutions (2026)

Has your laptop suddenly started rebooting for no apparent reason, without even having time to load the operating system? Or is the reboot cycle interrupted only for a few minutes of work? This problem may occur due to either hardware faults (overheating, faulty power supply, damaged RAM), or due to fault software failures (damaged drivers, viruses, update errors). In 70% of cases, the cause can be eliminated independently - without contacting a service center.

In this article we will look at all possible scenarios: from simple overheating to complex equipment conflicts. You will learn how to diagnose the problem by BSOD error code (if he manages to appear), what Key combinations will help start the laptop in safe mode even during cyclic reboots, and when exactly it’s time to take the device in for repair. Let's start with the simplest solutions - perhaps your case will not require in-depth diagnostics.

1. Check the power and power supply

The first thing to exclude is power problems. The laptop may reboot due to unstable voltage, faulty adapter or power connector. Start with a basic check:

• 🔌 Connect another power supply (preferably original). If the reboots stop, the problem is in the adapter. This is especially true for laptops Lenovo, HP And Acer, where non-original chargers often cause failures.
• 🔋 Remove the battery (if it is removable) and work only from the network. If the laptop is stable, the battery requires replacement (swelling or wear of the elements).
• 🔍 Inspect the power connector on a laptop: bent pins or looseness when connecting the cable can cause short-term power loss.

If you have a laptop MacBook (especially models before 2020), check the cable USB-C for the presence of damage - they often become the cause of spontaneous reboots. To diagnose, connect the charger to another device (for example, a smartphone) and see if charging is stable.

⚠️ Attention: Do not use power supplies with a power lower than the original ones - this can lead to overheating of the motherboard and constant reboots. For example, for ASUS ROG Strix with video card RTX 3060 A 200W adapter is required, not a 90W one.

2. Diagnostics of overheating

Overheating is one of the most common causes of cyclic reboots. Modern laptops (especially gaming laptops) MSI, Alienware or Legion) automatically turn off when the critical temperature of the processor or video card is reached (usually 95–105°C). Check it like this:

• 🌡️ Start the laptop in BIOS/UEFI (keys F2, Del or Esc when turned on). If it reboots here too, the problem is definitely a hardware one (overheating or a malfunction of the motherboard).
• 🔧 Check coolers: Listen to see if the fans are spinning. If not, the power controller may have burned out or the bearing has jammed.
• 🧹 Clean the cooling system. Dust between the radiator fins can block airflow. To do this, carefully remove the bottom cover and blow out the radiator with compressed air (do not use a vacuum cleaner!).

To accurately diagnose the temperature, use utilities like HWMonitor or Core Temp. If the laptop manages to boot for at least 5–10 minutes, run the test:

1. Установите HWMonitor (бесплатная версия).
2. Запустите стресс-тест в Prime95 или FurMark.
3. Следите за температурами CPU/GPU в реальном времени.

Component	Normal temperature (load)	Critical temperature
Processor (CPU)	70–85°C	>95°C
Video card (GPU)	75–85°C	>100°C
Motherboard chipset	60–75°C	>90°C

⚠️ Attention: If the processor temperature rises to 100°C in a matter of seconds even in the BIOS - this is a sign dried thermal paste or a peeling radiator. In this case, it is necessary to disassemble the laptop and replace the thermal interface.

3. Checking random access memory (RAM)

Damaged modules RAM can cause spontaneous reboots, especially if errors occur in the system kernel. You can diagnose the problem even without booting Windows:

1. Remove all RAM sticks and test them one by one. If the laptop works stably with one of the brackets, the problem is in the other.
2. Run the built-in Windows memory test utility:

   1. Нажмите Win + R, введите mdsched.exe и нажмите Enter.
   2. Выберите "Выполнить перезагрузку и проверку".

3. For in-depth diagnostics, use MemTest86 (bootable USB drive). The test must pass at least 4 passes without errors.

Pay attention to laptop models Dell XPS And HP Spectre - they often have problems with incompatibility of RAM sticks from different manufacturers. For example, if you added a module Crucial to standard memory Samsung, this may cause conflicts.

4. Windows driver and update conflicts

If the laptop restarts after a recent Windows update or installing drivers - a software problem. Most often the culprits are:

• 🖥️ Video card drivers (especially NVIDIA And AMD). Rolling back to a previous version often solves the problem.
• 🔄 Windows Updates (For example, KB5034441 for Windows 11 caused mass reboots in 2026).
• 🛡️ Antiviruses (For example, Kaspersky or Avast may block system processes).

How to restore stability:

1. Boot into Safe Mode (hold Shift when rebooting → "Diagnostics" → "Safe Mode"). If the reboots stop, the problem is in the drivers or software.
2. Roll back the video card driver:

   1. Откройте Диспетчер устройств (Win + X).
   2. Найдите "Видеоадаптеры", кликните ПКМ на вашу видеокарту → "Свойства" → "Откатить драйвер".

3. Uninstall the latest Windows update:

   Настройки → Обновление и безопасность → Просмотр журнала обновлений → Удалить обновления.

How to enter safe mode if the laptop does not boot?

If Windows doesn't start even before the login screen, try this method:

1. Force shut down the laptop (hold the power button for 10 seconds).

2. Repeat this 3 times - on the 4th time, Windows will automatically launch the recovery environment.

3. Select "Advanced options" → "Safe Mode".

5. Viruses and malware

Some viruses (for example, cryptocurrency miners or rootkits) can cause processor overload and spontaneous reboots. Laptops with pirated versions of Windows or disabled Windows Defender.

Signs of infection:

• The laptop restarts when connected to the Internet.
• B Task Manager a process with a high CPU load is visible (for example, svchost.exe or unknown name).
• The antivirus has been disabled without your knowledge.

How to clean the system:

1. Boot from LiveCD (For example, Kaspersky Rescue Disk) and scan the disk for viruses.
2. Check startup:

   1. Нажмите Ctrl + Shift + Esc → вкладка "Автозагрузка".
   2. Отключите все подозрительные программы.

3. Restore the system to the point before the problem occurs (unless a virus blocks this function).

6. Problems with your hard drive or SSD

Damaged sectors on HDD or worn cells on SSD may cause failures to read system files, causing a reboot. This is especially true for laptops older than 5 years with mechanical disks (Seagate, Toshiba).

Diagnostics:

• 💽 Check the SMART status of the disk with the help CrystalDiskInfo. If the status is "Pre-refusal" (Reallocated Sectors Count or Uncorrectable Errors have non-zero values) - the disk needs to be replaced.
• 🔄 Run disk check:

  1. Откройте командную строку от имени администратора.
  2. Введите chkdsk C: /f /r и подтвердите перезагрузку.

• 🛠️ Test your SSD for wear utility SSDLife. If wear exceeds 80%, the drive requires replacement.

If the laptop restarts when accessing the disk (for example, when copying files), try connecting it to another device via USB adapter. If the problem persists, the disk is faulty.

7. Reset BIOS/UEFI and check settings

Incorrect settings BIOS/UEFI (for example, overclocking the CPU/GPU, disabled cooling features, or incorrect RAM timings) can cause unstable operation. Also, settings failure may occur after updating the BIOS or turning off the power while it is running.

How to reset BIOS:

1. Hard reset:

   1. Отключите ноутбук от сети и извлеките батарею.
   2. Найдите на материнской плате перемычку CMOS (обычно подписана CLR_CMOS) и замкните её на 10 секунд.
   3. Если перемычки нет — извлеките батарейку CR2032 на 5 минут.

2. Reset via BIOS menu:

   1. Зайдите в BIOS (F2/Del при включении).
   2. Найдите опцию Load Default Settings или Reset to Default.

After resetting, be sure to check:

• 🔄 SATA controller operating mode (must be AHCI, not IDE).
• ⚡ CPU Power Settings (disable Intel Turbo Boost or AMD Cool'n'Quietif they cause overheating).
• 🖥️ Download priority (your disk should come first, not the network boot).

8. When to contact the service center

If none of the above methods help, the problem is most likely hardware room and requires professional diagnosis. Here are the signs when DIY repair is not advisable:

• 🔥 Laptop reboots even in BIOS - this indicates a malfunction of the motherboard or north/south bridge.
• 💥 There is a burning smell or visible swollen capacitors on the board.
• 🔌 Laptop won't turn on without battery (even with the original power supply) - the problem is in the power circuits.
• 🖥️ The screen flickers or artifacts appear before reboot - the video card is faulty (relevant for laptops with NVIDIA Optimus).

The cost of repair depends on the malfunction:

Problem	Approximate cost of repairs (2026)	Repair period
Replacing thermal paste/cleaning dust	1 500–3 000 ₽	1 day
Replacing RAM	2,000–5,000 ₽ (including module)	1–2 days
Repair of power circuits	4 000–10 000 ₽	3–7 days
Replacing the video card chip (BGA)	8 000–20 000 ₽	5–10 days

⚠️ Attention: If the laptop is under warranty - do not open it yourself! This will void the warranty. Contact an authorized brand service center (Apple, Lenovo, HP etc.).

FAQ: Frequently asked questions about laptop reboots

The laptop restarts when connected to charging. What's the matter?

This is a typical problem with power circuits or charging controller. Possible reasons:

• Faulty power connector (bent contacts or oxidation).
• Microcircuit failure BQ24780 or ISL6237 (on the motherboard).
• Short circuit in the battery (if it is swollen).

Solution: Try working without battery. If the problem persists, take it to a service center to diagnose the board.

The laptop reboots when launching games. What to do?

In 90% of cases this is due to:

1. GPU/CPU overheating - check the temperatures in MSI Afterburner.
2. Lack of food — the power supply may not be able to cope with the load (relevant for gaming laptops).
3. Driver conflict — roll back the video card driver or install it manually from the manufacturer’s website.

If the laptop turns off strictly at regular intervals (for example, after 10 minutes of play) - this is thermal throttling (overheat protection is triggered).

Can a virus cause constant reboots?

Yes, some viruses (for example, Trojan.Win32.Miner or Rootkit.Boot) can:

• Overload the processor with a cryptocurrency miner.
• Damage system files (ntoskrnl.exe, winlogon.exe).
• Block access to the task manager or antivirus.

How to check: Boot from LiveCD (For example, Dr.Web LiveDisk) and scan the system. If the antivirus finds threats but cannot remove them, reinstall Windows.

The laptop reboots after updating the BIOS. How to return the old version?

BIOS rollback is not possible on all laptops, but you can try:

1. Find on the manufacturer's website previous BIOS version (for example, for ASUS This is the section "Support → BIOS & Firmware").
2. Create a bootable USB flash drive with the firmware utility (for example, AFUDOS for ASUS or Flash Programming Tool for Lenovo).
3. Flash the old version following the manufacturer's instructions.

⚠️ Attention: Continuous nutrition is critical! If the process is interrupted, the motherboard may fail.

Should I change thermal paste myself?

If you have experience disassembling equipment, yes. Risks for beginners:

• Damage cables or contacts when opening.
• Apply the paste incorrectly (for example, in a too thick layer), which will impair heat dissipation.
• Break off the radiator mounting screws (especially in laptops) Apple or Dell XPS).

Recommendations:

• Use thermal paste Arctic MX-6 or Noctua NT-H2.
• Follow the guides specifically for your model (for example, disassembly MacBook Pro And Lenovo ThinkPad very different).
• If in doubt, take it to a service center (the cost of the work is ~1,500 ₽).