Slick said
Yea, your chances of getting hacked on a user PC are slim unless someone specificly targets you.
I totally agree with Primesuspect, Slick. I just ran a quick scan on my cable subnet, and then picked 5 of the active computers on the subnet to run basic port scans. Even on the simple short scan, 3 of those 5 had open ports, even the obvious Windows networking 139 port open. I didn't bother trying to see if they had basic username security, and I bet if I did a full port scan (not approved by most ISP's, by the way...) there would be all kinds of open backdoors and trojan shares.
Don't kid yourself into thinking someone will only hack you if they have a grudge against you. There are all kinds of "kiddie hackers" out there these days who love to find open ports, set up a trojan, and then start using your computer to run their own FTP or download from from Peer-to-Peers on to your hard drive, eating up your bandwidth instead of paying for their own.
Broadband connection + no firewall = stupid. Plain and simple.