Which of the following is the MOST likely cause of the reboots in the case that a technician is troubleshooting a PC that intermittently reboots on its own, is situated in the center of a warehouse setting, and is housed in a securely sealed cabinet that is free of dust and debris; the technician checks Event Viewer but sees no correlation between the reboots and other system activity; the only notable thing is that the reboots all happen in the afternoon and the technician reseats the two DIMMs of RAM and verifies all the cables and components are securely connected?