I have definitely seen issues where an unterminated reset line was susceptible to causing reboots from static electricity charges from people, chairs, etc. seve

I have definitely seen issues where an unterminated reset line was susceptible to causing reboots from static electricity charges from people, chairs, etc. several feet away. Not even discharges, just charged objects moving around. Perhaps the line to the reset jumper on the motherboard is not connected or is not grounded correctly and is acting as an antenna. Issues like this usually involve 2-3 underlying issues. For example, #1, the cat, #2 faulty motherboard design without protection on the reset line, #3 bad wiring. Or something like that. I'd get rid of the computer, or get rid of the cat. Depending on which one is a bigger problem.