windows firewall

But not really worth the headache keeping it.

The only thing it will do is give you 1 additional level of protection should some knothead bring in a virus or worm that get's past your defenses.

In any normal domain that has something like a propely configured PIX I disable the local firewalls so that I don't get any interference with applications.

I believe that the benefits do NOT out weigh the potential problems that you may see down the road.

Best of luck.