nortelmonitor.dll is a NortelVpnManagedApp.dll
belonging to Server Manager Service
from Fiberlink Communications Corp.
Non-system processes like nortelmonitor.dll 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.