Again and again hackers try to get the sensible data of users. Those persons don´t just try to get the data of companys.

As there already has been a lot of damage in the past, for example by dialers as well as by harmful software such as virus, worms or trojans, a sensible protection should not be disregarded.  

An antivirus program represents an essential precaution for your computer and helps combined by an active firewall to prevent the computer against attacks from outside your network.