A technician is investigating reporting issues with a computer. The technician logs into the computer, checks the Event Viewer and notices messages about unexpected shutdowns. The technician checks the Device Manager, but there are no errors or warnings. The computer shuts down unexpectedly during troubleshooting. The technician pushes the power button, but the computer does not power on. The technician opens the computer case, checks all cables and connectors, and verifies they are connected properly. The technician closes the case and pushes the power button again, and the computer boots.
After working for a few minutes, the computer shuts down unexpectedly once again. Which of the following is the MOST likely reason for the unexpected shutdowns?