Get Zonealarm. The Pro version is worth the extra but even the "vanilla" version (which is free) is the best software firewall around. Check the tech sites if you don't believ me . 
As long as the bast keeps it's settings through a reboot...
3 office computers - POS software - Zone alarm...
Zone alarm kept forgetting that the local net was friendly and kept protecting the computers from those nasty local pc's
Kerio solved the problem.
Now back to your currently scheduled program...
Fran

Powerball: 12,799 :burnout:
Crashometer: 2002

, 2003, 2004, 2005

, 2006, 2007