I am a net seeker and almost half the day I use to sit in front of my system and surf net….. Yesterday while surfing net I read an article about security software…. I want to know that what does this security software used for and is it necessary to download this software if you surf the net a lot… I know some of the software but want to know more about it…. Tell me that how this software helps to protect the system from any kind of virus?