The laptop that reboots spontaneously in a loop is one of the most annoying problems. You lose unsaved work, risk file system corruption, and in the worst case scenario, experience complete device failure. The reasons for this behavior may lie in software failures (BSOD, drivers, viruses) and hardware faults (overheating, power supply, RAM). In this article we will analyze all possible causes of cyclic reboots, including rare cases that are not written about in standard instructions.

It is important to understand: if the laptop doesn't turn on normally and immediately goes into reboot, this does not always mean a fatal breakdown. In 60% of cases, the problem can be solved independently, without resorting to the services of a service center. We have compiled a diagnostic checklist - from simple to complex - that will help identify the root of the evil. And if you are afraid of losing data, at the end of the article there is a section on how to save it even on a “dying” device.

1. Overheating: why the laptop turns off and immediately turns on again

The most common reason spontaneous reboots — thermal throttling (emergency shutdown due to critical temperature). Modern processors (Intel Core i7/i9, AMD Ryzen 7/9) automatically turn off the system when reaching 100–105°Cto avoid damage to the crystal. If the cooling fails, the laptop goes into reboot as soon as it has time to boot.

How to check:

  • 🔥 Listen to the fans: They should run at high speed when loading. If you hear grinding or silence, the blades are most likely clogged with dust.
  • 🌡️ Use HWMonitor or Core Temp: run the utility immediately after turning it on (if you have time) and monitor the temperatures CPU/GPU.
  • 🖥️ Check in BIOS: some models (Lenovo ThinkPad, Dell XPS) show the temperature directly in the menu Hardware Monitor.

Solutions:

  • 🧹 Dust removal: disassemble the laptop (or contact service) and blow out the radiator with compressed air. Especially relevant for models ASUS ROG, MSI GS66 — their cooling system quickly becomes clogged.
  • 🧴 Replacing thermal paste: if the temperature rises higher 90°C in idle time, the paste has dried out. For Intel will do Arctic MX-6, for AMD — Noctua NT-H2.
  • ⚙️ Fan settings: in BIOS (Advanced → Fan Control) set an aggressive cooling profile.
📊 How often do you clean your laptop cooling system?
  • Once every 3 months
  • Once every six months
  • Once a year
  • Never
  • Only when problems start
⚠️ Attention: If the laptop restarts only when connected to charging, the problem may be power supply, not in cooling. Check its output voltage with a multimeter (should be 19–20V for most models).

2. Problems with the power supply and battery

Unstable nutrition is the second most common cause of cyclic reboots. Symptoms:

  • 🔌 Laptop turns off when charging is disconnected (even if the battery shows 100%).
  • ⚡ Reboot occurs when connecting/disconnecting the charger.
  • 🔋 B Device Manager There is an exclamation mark next to the battery.

Diagnostics:

  1. Connect another original power supply (for example, from a similar model HP Pavilion or Acer Swift).
  2. Check power connector on a laptop: if it wobbles, a contact on the motherboard may have come loose.
  3. Start your laptop without battery (online only). If the reboots stop, the battery is to blame.
Symptom Probable Cause Solution
Reboot when laptop moves Poor contact in the power connector Resolder the connector or replace the socket
Laptop won't turn on without charging Battery wear (capacity < 20%) Battery replacement
Cyclic reboot at 100% charge Battery controller failure Reset BIOS or replace battery
The laptop turns off under load (games, rendering) The power supply does not provide the required power Replacing with a unit with a higher ampere (for example, with 65W on 90W)
💡

If you have a laptop MacBook Pro/Air, try resetting the System Management Controller (SMC). To do this, turn off the device, hold down Shift + Control + Option and the power button for 10 seconds, then release and turn on the laptop.

3. Failures in the operating system: from BSOD to viruses

If laptop manages to load Windows, but then goes into reboot, the software is to blame. Common scenarios:

  • 🖥️ Blue Screen of Death (BSOD): death screen with error code (eg IRQL_NOT_LESS_OR_EQUAL, CRITICAL_PROCESS_DIED).
  • 🦠 Viruses/mining bots: some malware (WannaCry, CoinMiner) cause the CPU to overheat, causing a reboot.
  • 🔄 Automatic update: Windows may reboot due to a failure during the installation of updates (especially true for Windows 10 22H2 And Windows 11).

How to fix:

  1. Boot into Safe Mode: 
    Нажмите F8 (или Shift + Перезагрузка) → Диагностика → Дополнительные параметры → Параметры загрузки → Безопасный режим

    If there are no reboots in safe mode, the problem is in the drivers or software.

  2. Check the error log:

    Open Control Panel → Administrative Tools → Event Viewer → Windows Logs → System. Look for errors with the code Event ID 41 (unexpected shutdown).

  3. Uninstall the latest updates:

    Go to Settings → Update & security → View update history → Uninstall updates.

Boot into Safe Mode|Check the Windows Event Log|Scan the system for viruses (Kaspersky Virus Removal Tool)|Roll back video card drivers (NVIDIA/AMD)|Check the integrity of system files (sfc /scannow)

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For Linux-systems (for example, Ubuntu or Fedora) check the kernel logs:

sudo dmesg | grep -i "error\|fail\|segfault"
⚠️ Attention: If the laptop restarts when trying to enter BIOS, this is almost always a hardware problem (motherboard, RAM or processor). Software methods will not help here.

4. Malfunctions of random access memory (RAM)

Damaged modules RAM may cause spontaneous reboots, especially under load (running games, editing videos, compiling code). Symptoms:

  • 💥Laptop crashes into a blue screen with an error MEMORY_MANAGEMENT.
  • 🔄 Reboot occurs when opening multiple tabs in the browser.
  • 🖥️ B Task Manager it's clear that Not all memory is used (for example, out of 16 GB, only 8 GB is available).

Diagnostics:

  1. Use the built-in utility Windows Memory Diagnostic: 
    Win + R → введите mdsched.exe → Перезагрузить и проверить
  2. For an in-depth check, download MemTest86 and write it to a flash drive. The test must pass minimum 4 passes no errors.
  3. If you have several planks, check them one by one (pulling out one by one).

Solutions:

  • 🔧 Clean RAM contacts eraser or alcohol. Oxidation can cause malfunctions.
  • 🔄 Change slots: Sometimes the problem is in the connector on the motherboard.
  • 💰 Replace memory, if tests show errors. Suitable for laptops Crucial or Kingston with support DDR4-3200 (check compatibility on the manufacturer's website).
What to do if MemTest86 does not start?

If MemTest86 does not start or the laptop reboots during the test, this may indicate:

1. Malfunction north bridge on the motherboard (a common problem with ASUS And MSI 2018–2020).

2. Damage memory controller in the processor (relevant for Intel 8–10 generations).

In this case, only diagnostics at a service center with checking for POST card.

5. Problems with your hard drive or SSD

If laptop Freezes and reboots when accessing the disk (for example, when copying files or launching programs), the drive is at fault. Signs:

  • 💾 Clicking or grinding noises from the body (HDD).
  • ⚡ The laptop freezes for 10–30 seconds, then reboots.
  • 📉 Read/write speed drops to 0 MB/s (checked in CrystalDiskMark).

Diagnostics:

  1. Check SMART status disk in CrystalDiskInfo. Critical parameters:
    • Reallocated Sectors Count (redistributed sectors)
    • Current Pending Sector Count (unstable sectors)
    • Uncorrectable Error Count (uncorrectable errors)
  • Run the test in Victoria HDD or HD Tune. If there is bad sectors, the disk needs to be replaced.

    • Solutions:

    • 🔄 Clone the disk to a new one SSD with the help Macrium Reflect or Clonezilla (if the laptop still somehow works).
    • 🛠️ Check your connection: disconnect and reconnect the drive (sometimes helps with contact oxidation).
    • 🗑️ If this HDD, try disabling APM (Advanced Power Management) in Device Manager (disk properties → power management policies).
    💡

    If the laptop restarts only when connecting a second drive (For example, M.2 SSD in the additional slot), the problem may be controller incompatibility or lack of nutrition. Check support NVMe for your model on the manufacturer's website.

    6. BIOS/UEFI failures and hardware incompatibility

    Rare, but apt: incorrect BIOS settings or firmware failure can lead to cyclic reboots. This is relevant after:

    • ⚙️ BIOS updates (especially on laptops Lenovo Legion, HP Omen).
    • 🔧 Replacing the processor or memory for incompatible models.
    • 🔋 Reset BIOS settings (for example, after removing the battery CMOS).

    How to fix:

    1. Reset BIOS to factory settings:

      - Turn off the laptop, disconnect the charger.

      - Press Win + V (or Fn + Esc for HP) and turn on the power.

      - From the menu select Load Default Settings.

    2. Update BIOS (if the laptop somehow boots):

      - Download the firmware from the official website (support.lenovo.com, downloadcenter.intel.com).

      - Use only recommended version for your model!

    3. Check your settings Secure Boot And Fast Boot:

      - Disable Fast Boot (may conflict with some SSD).

      - Turn on Secure Boot, if it is disabled (relevant for Windows 11).

    ⚠️ Attention: If after updating the BIOS the laptop won't turn on at all (black screen, no POST), this is called "bricked". Operation can only be restored with the help of programmer (For example, CH341A) at the service center.

    7. Viruses, mining and hidden processes

    Some malware specifically provoke rebootsto:

    • 🕵️ Hide your activity (For example, Trojans type Emotet).
    • ⛏️ Disguise mining (virus XMRig can load the CPU to 100%, causing overheating).
    • 🔄 Bypass protection (some ransomware reboot the system to encrypt files in secure mode).

    How to detect:

    1. Open Task Manager (Ctrl + Shift + Esc) and sort the processes by CPU/GPU load.
    2. Check startup: Settings → Applications → Startup.
    3. Use Process Explorer (from Microsoft) for in-depth process analysis.

    Removal:

    • 🛡️ Boot from LiveCD (Kaspersky Rescue Disk) and scan the system.
    • 🔍 Check the registry for suspicious entries: 
      HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
    • 🗑️ Delete temporary files: 
      C:\Users\ИмяПользователя\AppData\Local\Temp
    How to remove a mining virus if the antivirus does not help?

    If standard tools do not detect the virus, try:

    1. Turn off the Internet (the virus can download itself again).

    2. Boot into Safe Mode with Networking.

    3. Remove all unknown processes in Task Manager.

    4. Check the folders:

    C:\ProgramData\

    C:\Users\Public\

    Look for files with random names (for example, svchosts.exe instead of svchost.exe).

    5. Use Malwarebytes Anti-Malware or HitmanPro for deep cleaning.

    8. Hardware faults: motherboard, processor, video card

    If all the previous methods did not help, the problem is at the iron level. The most difficult cases:

    • 🔧 Motherboard failure:

      - Swollen capacitors (relevant for old laptops Sony Vaio, Toshiba Satellite).

      - Cracks in the paths (often after a fall).

    • 🖥️ Problems with the video card:

      - NVIDIA series GTX 10xx/RTX 20xx may overheat due to dried thermal paste.

      - AMD Radeon (For example, RX 5600M) sometimes conflict with drivers.

    • ⚡ Unstable power supply to controllers:

      - Laptops Dell XPS 15 And MacBook Pro 2018 known for eating problems VRM-modules.

    Diagnostics:

    • 🔍 Visual inspection: disassemble the laptop and check for darkening, swelling, burning smell.
    • 🔧 Test POST codes: if the laptop emits sound signals when turned on, decipher them according to the table for your model (for example, 1 long + 3 short at HP means a problem with the video card).
    • 💻 Testing on another laptop: connect your SSD or RAM to a known working device.

    Solutions:

    • 🔧 Resoldering of chips (relevant for NVIDIA with a problem "chip hell").
    • 💰 Replacing the motherboard (sometimes it's cheaper to buy a new laptop).
    • 🔌 Checking power circuits multimeter (requires soldering skills).
    💡

    If laptop reboots at regular intervals (eg every 5-10 minutes), this almost always indicates problem with power supply to the memory controller or north bridge. In 90% of cases, only replacing the motherboard helps.

    FAQ: Frequently asked questions about cyclic laptop reboots

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

    This may be due to:

    • 🔌 Network card driver (update it manually from the manufacturer's website).
    • 🦠 Virus, which is activated when connected to the network (check hosts-file for suspicious entries).
    • ⚡ Failure in Windows Update (disable update service and check stability).
    The laptop turns on, shows the logo and immediately reboots. What to do?

    The problem is most likely:

    • 🖥️ Damaged Windows bootloader (restore it with bootrec: 
      bootrec /fixmbr

      bootrec /fixboot
      

      bootrec /scanos
      

      bootrec /rebuildbcd
      ).

    • 💾 Failed disk (try booting from LiveCD).
    • ⚙️ BIOS failure (reset settings or reflash).
    Is it possible to save data if the laptop keeps rebooting?

    Yes, there are several ways:

    • 💾 Connect the drive to another PC through USB adapter (For example, SABRENT).
    • 🔧 Use LiveCD with Ubuntu or Hiren’s BootCD to copy files.
    • ☁️ If the disk is not detected, contact a data recovery laboratory (for example, ACELab or Hetman).

    Do not try to recover data yourself, if the disc makes a grinding noise, this can aggravate the damage!

    The laptop only restarts when playing games. What is the reason?

    Most likely, one of the following is to blame:

    • 🎮 Video card overheating (check the temperature in MSI Afterburner).
    • ⚡ Lack of power supply power (replace with a more powerful one).
    • 🔧 Driver conflict (roll back to the old driver version NVIDIA/AMD).
    • 💥 RAM fault (test MemTest86 under load).
    After replacing the thermal paste, the laptop began to reboot more often. What's wrong?

    Possible errors:

    • 🧴 Too much pasta - excess may get on the contacts.
    • 🔧 The radiator is poorly secured — check the uniformity of the pressure.
    • 🌡️ Poor quality paste used (For example, KPT-8 instead of Arctic MX-6).
    • 🔌 Thermal sensor is damaged (the laptop “thinks” that the temperature is critical).

    Disassemble the laptop again and make sure the paste is applied in a thin layer (as thick as a sheet of paper).