Firewalls may not completely protect a computer. Malicious software may be able to get through a firewall and onto a system. Anti-Malware such as anti-virus, anti-phishing and email filtering software offer some protection against harmful software that reside within a computer. The amount of malicious software available over the Internet is steadily increasing. It is important for defensive users to use to anti-malware that is both effective and easily updated in order to combat new strains of malicious software that are developed.