Bird,
I would second the suggestion that you get a
BEFSX41 Wired Router. They are running $70 on Amazon.com. You would run a Cat5 patch cord from your cable modem to the Router, and then plug your computer into the router. You will have to call your cable modem provider with your new MAC address (it is the "address" or "number" for your particular router and it found in the instruction manual). When I installed my router three years ago they tried to hassle me about having multiple computers connected and they wanted to charge me more, however they cannot tell how many computers you are running if you don't tell them (this router will connect up to four computers to the Internet on the same account.) Actually, the routers save them a lot of tech time since systems behind routers don't get screwed up and require tech advice to repair.
I have been running behind a Linksys Router for the past three years. It blocks every probe attempt. I've even checked my system through
Gibson Research Shields UP!, and my system is rated as "invisible" to the script kiddies and hackers. I run Norton Personal Firewall just to limit pop-ups and to check which programs are accessing the internet. I've also turned up my Internet Explorer Options for security and privacy.
A word on wireless routers - an aquaintance has cancelled his cable modem contract since he can access up to a dozen wireless routers from within his subdivision. It seems that his neighbors aren't too careful with security settings, and for the last year he has had all his high speed access provided by unknowing neighbors with wireless routers!
You don't really need the latest versions of the Norton software. I have used Norton for at least nine years, and generally buy a new version with each new operating system. You can purchase Norton Antivirus Subscriptions to update the virus definitions on a yearly basis.
Not the advice of an alpha geek, nor the advice of a Holiday Inn Express patron, just telling you what has worked for me.