hackers are NOT interested in personal computers, most of the time the alert your firewall gives are NOT hackers but merely you isp or other internet server just pinging your machine to send/recieve data and/or to check you are on line,
So by all means get AVG (a must) and Zone alarm
but dont get to worried about these so called 'hackers' attempts
This cannot be true. I don't worry about hackers as I trust my Norton firewall. However, when I get a hacking attempt I usually trace it's origin out of curiosity. Most of the attempts come for Italy, Australia and California, with some from other parts of the USA. I don't think that NTL are hacking me from these places.