I have noticed that from time to time on my XP SP3 system, Outpost Firewall Pro's "acs.exe" process runs for extended periods of time at pretty high memory usage levels (~115MB). What's this all about?
It's the Agnitium Client Service, the main firewall component. op_mon is only the GUI. It updates the pre-sets etc so could be doing that or if there is heavy internet traffic,P2P etc?