Vunerable acc to Symantec; now what?

[flapsforty]

Window XP, IE 6 ( I think), Norton Antivirus.
Stopzilla and Adaware installed.

As suggested by Out of Trim on another thread, I have just run http://security.symantec.com/sscv6/d...d=in&venid=sym
expecting, as a a faithful follower of all stickies-advice on this forum, to come out clean as a whistle.

I didn't.

It tells me that my PC is vulnerable to hackers, because I have an open port. Huh? It gives Ping, loc-srv and Windows NT / 2000 SMB as open. It tells me I need a personal firewall.
Here was me thinking that I had that with my Norton, but apparently not.

PC also vulnerable to Trojans due "Unused Windows Services Block" times 2.

Any advice or links to previous threads on the subject recieved with humble gratitude.