Craterus-

Get yourself a firewall http://www.zonelabs.com - look 4 the trial version

antivirus http://www.free-av.com/

and a trojan hunter to be safe http://www.trojanhunter.com/ (i think this ones trial is good- but im not sure)

Most of all, if you havent joined the revolution yet- get firefox http://www.mozilla.org/products/firefox/

Cheers