1 The computer system is poisoned or infected with malicious software.
2 cpu fan is broken, cpu temperature is too high, overheating protection.
The power supply is broken, or new hardware is added, and the power supply is insufficient.
4 the video card or the video card fan is broken.
5 the motherboard is broken and the motherboard core is overheated.
Solution:
1 Check whether the antivirus software has killed the virus, and you can determine whether it is caused by computer system poisoning or malicious software. If there is a virus, it is recommended to use a combination of various anti-virus software to kill the virus. If it still doesn't work, reinstall or restore the system, and it can be solved.
Download Master Lu's software, test the temperature of computer hardware, open the chassis, see if the cpu fan and graphics card fan rotate normally, find out the problem and replace the cpu fan. 30-100 yuan. (cqjiangyong summary: the cpu fan is broken, which is the most common automatic shutdown problem)
If the computer is equipped with a discrete graphics card, the power supply is not enough, so you can only change to a more powerful power supply. If the power supply is unstable for a long time, it should also be tested with another power supply.
4. Turn off the computer and touch the south bridge chip, north bridge chip and graphics card chip of the motherboard with your hands. If it is very hot, it may be broken and need to be repaired.