If you have zonealarm installed, you should get the patch, or if you have no connectivity on another PC, uninstall the product.  The problem manifests itself as the ability to ping servers (I have always used www.ford.com), but IE or Firefox will not be able to connect to any website.  You should enable windows’ firewall at least if you choose to uninstall zonealarm, or get something to protect you in the interim, as it can take as little as four minutes to compromise an UNPATCHED windows box with no NAT or firewall.