Norton Firewall

I recently changed my ISP to SBC-Yahoo. They provide FREE Online protection and firewall. I was using Norton Internet Security, Spyware Doctor, MS Antispyware, and Ad-Aware. I decided to get the free stuff instaaaaead of paying yearly renewal fees. So, I removed all of them, had some problem with Norton so I had to get the Symantec removal tool from this site, But now I have NONE of them except the SBC-Yahoo online protection. But, when I go into control panel-security center-firewall, it still says Norton firewall is currently on. How do I change the firewall and/or is this a false message, because when I do a search for Symantec or Norton nothing comes up. Is there a way to change the firewall??