My computer restarts on its own, what causes this. Dell's support doesn't seem to know how to fix it?

Hi Melvin Adkins,

Welcome to Microsoft Community.

Based on the original description, the device seems to be experiencing issues related to the unexpected restart/reboot behavior.

There are several reasons why a computer might restart on its own. Here are some of the common causes:

• Power Supply Issues: The computer could be randomly rebooting due to a failing power supply unit (PSU). If the PSU is overheating, giving off a burning smell, or releasing smoke, it could be a sign of failure. Also, if the PSU can't handle your load, meaning some components aren't getting enough power, this can cause system instability and trigger random restarts.
• Overheating: When certain hardware components, such as the CPU and GPU, overheat, your computer can go into self-preservation mode. It will do this to protect other components from heat damage. One of the signs of an overheating PC is automatic restarts.
• Hardware Issues: Issues with RAM or hard disk or new hardware changes can also lead to automatic and random system shutdowns or restarts.
• Malware and Ransomware: Change in registry values due to malware or virus infection can cause the computer to restart.

From a hardware design and power management perspective, modern processors utilize features such as clock gating, power gating, and dynamic voltage and frequency scaling (DVFS) to reduce the overall energy consumption of the platform while maintaining high performance. Sometimes, these advanced power management methods can sometimes lead to unpredictable system behavior, including unexpected restarts.

If by “uninstall and reinstall the operating system” you mean completely wipe the disk data and reinstall a fresh copy of Windows, then the problem may be focused on the hardware itself.

For example, the external power supply environment, the age of the internal electronics due to aging/dust buildup, which may create an abnormal circuitry environment that can transmit abnormal electrical signals in some scenarios, causing the device to trigger abnormal reboot behavior.

For this type of problem, you may usually need to contact a professional computer support store to assist you in completing more complex hardware cross-tests, hardware stress tests, and power supply environment tests in order to more adequately narrow down the scope of the problem to be analyzed.

If by “uninstall and reinstall the operating system” you don't mean a reinstall that wipes out all data, it may still be worthwhile to perform tests on the system itself, for example, testing some Windows with a different build date.

Discussion messages from community members in this thread mentioned channel to obtain some of the previous versions of Windows.

• Where can I download the windows 10 and/or 11 iso for ARM - Microsoft Community (The channel is not provided directly by Microsoft and you can refer to the previous few paragraphs for the communication process between Volunteer Moderator and the original poster.)

If I misunderstand your situation, feel free to correct me and share the information.

Best Regards,

Kyo.Y - MSFT | Microsoft Community Technical Support