The potential cause of a newly clean installed Windows 10 system halting and rebooting itself with self-diagnose can be due to several reasons, including:
Hardware issues: Faulty hardware components such as a failing hard drive, malfunctioning RAM or overheating CPU can cause the system to crash and reboot.
Driver issues: Incompatible or outdated device drivers can also cause system instability and crashes.
Software conflicts: Conflicts between installed software or corrupted system files can lead to system crashes and reboots.
Malware or virus infection: Malware or virus infection can cause system instability and unexpected crashes.
To diagnose the issue, one can try running a system scan with antivirus software, updating drivers and software, checking hardware components for errors, and monitoring the system's temperature to ensure it is not overheating.
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