sysmon.exe from AOpen is a Motherboard hardware monitoring tool which comes with some AOpen motherboards. This startup process monitors CPU temp, voltage and fan speed. "This program is a non-essential system process, but should not be terminated unless suspected to be causing problems. "
Non-system processes like sysmon.exe originate from software you installed on your system. Since most applications store data in your system's registry, it is likely that your registry has suffered fragmentation and accumulated invalid entries which can affect your PC's performance. It is recommended that you
check your registry to identify slowdown issues.