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When choosing an antivirus software for your home or business you must consider more than the detection rate of a program during controlled tests. It is important to make sure that it is able to detect the latest malware and viruses. The virus writers are always working on ways to defeat antivirus software. They create viruses that can disable them, hide from the detection methods, or overcome the antivirus software itself.

One of the earliest types of antivirus programs operated by comparing files coming into devices against their database of malware signatures that they have identified. This kind of signature detection works for malware that is older. However, virus creators are able to create new signatures at any time for new types of malware.

Modern versions of antivirus software use the heuristic detection method to detect potential threats. Rather than looking for exact matches, heuristics evaluate the patterns of programs and files to determine whether they are akin to known malware. This technique is enhanced by behavior-based detection, which looks at the way in which a program or program behaves in order to determine if it’s infected.

Some viruses attempt to thwart anti-virus programs by hiding from detection, blocking access to the update system of antivirus programs or destroying library code files that a virus scanner requires to perform its job. More sophisticated viruses target the antivirus software by directly altering or disabling elements of it. These types of viruses are becoming more widespread and often come with features like the worm component which spreads from computer to computer.