Hey Guys,

I am a subscriber to Tech Tv!!! It rox! NOw, on this chan there is a show called "CyberCrime" Some of you may be familiar with it.. Its pretty good... and it talks about security stuph in general....
Anyway... To the point.... I was watching the show, and they had a guest hacker on it.. He was doin demonstrations for the importance of firewalls ....To make a long story short.... He got into a comp that wasn't protected and he changed the Desktop wallpaper (What a crime!!!) :P and then to make sure that the user saw it... He crashed the system.. so that it re-booted to show the new wallpaper...

I was wondering... How can I avoid gettin my sys crashed??? How is it done??? Is there any other way than just a firewall???

Thanks for your input