I'm telling you the best thing I ever did was buy Norton's Internet Security. Its virus protection, Pop-up blocker and firewall all in one. You can specify what sites can be blocked... we have gator, weatherbug, and a few others that rive us nuts with once-its-on-you-can't-get-it-off. It was fairly cheap (as I remember) and well worth the money in frustrations!

You'll be amazed at how much your current virus blocker isn't blcocking once the firewall is set up!