It's the software, stupid
Ed Ray · Network Security · 2008
According to the 2005 US Federal Bureau of Investigation (FBI) Computer Crime Survey1 (see Figure 1), 98% of enterprises in the United States deploy antivirus software on their systems and 91% also use perimeter firewalls. The survey also indicated that 84% of enterprises were attacked by worms or viruses, and 79% experienced spyware penetration. These statistics show that attacks persist despite employing the best protection measures.