Spyware has surpassed viruses and worms to become Network Enemy #1. The reason is
that the threat has evolved and blended with other malicious threats to create a
very powerful threat to your network. Spyware often contains keystroke logging or
rootkit components that allow an attacker to capture usernames, passwords, social
security numbers and other confidential data, or to gain complete access and control
over systems on your internal network.