Security software for the desktop in the form of antivirus and personal firewall are very important in keeping your computer secure. They operate similarly to the police - looking for intrusion attacks and blocking these attacks from reaching your computer. However, the huge amount of criminals and the huge amount of attacks make it very hard for antivirus solutions to keep you safe online.
Recent product reviews indicate that when it comes to new threats, the detection rate of leading antivirus solutions drops to less than 30%. This means that the majority of online threats would go undetected by your antivirus solution.