lcdmon.exe is a Logitech G-series LCD Monitor
from Logitech Inc.
belonging to G-series Software
. Usually it starts up automatically.
Non-system processes like lcdmon.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.