How can I get XP pro's firewall to run on a network? I have two computers hooked up to a D-link router which lets the machines share files and access my cable internet. When I switch on XP's firewall the network on both machines gets disabled. At the very least one computer is able to run a MacAffe firewall and the D-Link router supposedly comes with a firewall (but I have yet to detect or see it running). I would at the very least like to get XP's firewall running so both computers are protected equally. Any help would be appreciated, thanks.