5.1.1 Review vendor documentation and examine anti-virus configurations to verify that anti-virus programs;
• Detect all known types of malicious software,
• Remove all known types of malicious software, and
• Protect against all known types of malicious software.
Examples of types of malicious software include viruses, Trojans, worms, spyware, adware, and rootkits.
It is important to protect against ALL types and forms of malicious software.