A warehouse employee reports that his desktop PC randomly freezes or reboots during the day. While the system is running, it emits a constant high-pitched squealing noise from inside the case. Which of the following is the most likely cause of the problem?
A failed cooling fan causing the system to overheat
Warehouses accumulate dust that can clog or seize cooling fans. A failing fan often produces a high-pitched squeal when its bearings wear out. With the fan unable to move air, the CPU and internal components overheat, triggering system instability such as random freezes or reboots. Battery issues or sticking keys would not create the described noise, and bad driver software would not account for the mechanical squeal.
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