Automatic computer shutdown can be caused by a number of reasons, and here are some common scenarios:
1. Heat dissipation problem: If the heat dissipation of the computer is poor, it may cause the computer to overheat, which will automatically shut down. You can check if your computer's cooling fan is working properly, clean the heatsink and fan from dust, or add cooling pads to fix the problem.
2. Software conflict: Some software may conflict with the operating system or other software, resulting in automatic shutdown of the computer. You can try uninstalling the conflicting software, or updating the software version to resolve the issue.
3. System problems: Loss or damage of files in the operating system may also cause the computer to shut down automatically. You can try using a system recovery or reinstalling your system to fix the problem.
4. Hardware problems: Hardware failures of the computer may also lead to automatic shutdown. You can check whether your computer's memory, hard drive, graphics card, and other hardware are working properly, or replace the damaged hardware to fix the problem.
If the problem persists with the automatic shutdown of your computer, we recommend that you contact your PC manufacturer or a professional PC repairer for diagnosis and repair.