Antivirus

To be considered a true computer Virus, a program needs the ability to replicate itself and trigger its activity at specified events. A computer virus is just one of three types of programs known as "maliceware". "Maliceware" are applications designed to damage, delete or steal your information, hijack your computer and even damage or destroy your computers hardware. The three types of "maliceware" you need to concern yourself with are Viruses, Trojans and Worms. Most antivirus programs are designed to detect and defend your PC from all three threats.

What Does an Antivirus Program Do?

Antivirus programs take two common approaches to recognize threats to your computer.

1. Signature Detection: Via Signature Detection an antivirus application scans your computer, drives and storage devices for files that contain a code it recognizes as a virus variant.

2. Activity: An antivirus application will monitor the activity on your computer for suspicious behaviors i.e. modification of system files or folders and unauthorized connections to the internet to name two.

Signature detection generally requires the manufacturer of an antivirus application to obtain a copy of a specific virus and then reverse-engineer it to obtain markers relevant to its programming. These markers are then loaded into your antivirus software via updates. Signature detection is a sound methodology for detecting and protecting against computer viruses, however it can be rendered useless when faced with a virus for which is has no definition.

Antivirus applications that scan for potential computer virus activity can be more useful at detecting the latest threats than those reliant on signature detection. It is important to note that because many applications perform the same activities as a virus - writing and changing system files for example - a user can quickly become inundated with numerous and unnecessary warnings by antivirus applications that utilize this method for detection.

Most of today's "solid" antivirus programs utilize a combination of both signature detection and virus activity to protect your computer against threats.

How to Choose the Antivirus Program that is Right for You.

If you try surfing the web for insight into what is the best antivirus program or manufacturer, you will quickly find yourself neck deep in a sea of advertisements which profess themselves to be legitimate and impartial evaluators of the available programs. The truth is, of the major manufacturers, no one solution can provide for all of your potential needs. They all have instances where they are not as effective as the competition at detecting or eliminating a specific infection or threat. There are many good Antivirus applications and manufacturers all vying for your business, be it for personal or business use, and choosing the correct application or manufacturer for your computer security can generally come down to a few simple questions.

How at Risk are You?

Asking yourself this question is perhaps the first and most important step toward choosing what degree of protection you need, and how much money you are willing to spend, on Antivirus protection. Risk generally equates to your computers exposure to outside applications, files or connections. If you were to operate a computer that would never come into contact with any program or file not manufactured by a secure source, then you have virtually no need for an Antivirus application. Simply put, if you never plan to connect your computer to the internet, download files with it or upload "at risk" files from outside data sources, you should have no need for Antivirus software.

If you are a casual user who perhaps connects to the internet on occasion through a temporary or dial up connection and only download or upload files and programs from reasonably secure sources, your need for an antivirus program is clear, however, your risk may be minimal. In this situation the types and range of protective applications can be kept to a minimum; a basic antivirus program designed to regularly scan your hard drive for infections should offer you the protection that you need. There are many good antivirus programs that will fit this need available as shareware - a free download - throughout the internet.

Now, if you are like what I would consider to be the majority of today's computer users, you are a high risk user and need a wide variety of the most up to date antivirus programs available. If you have a broadband internet connection which keeps your computer connected to the internet 24/7. If you regularly upload and download files and applications from random and un-trusted sources, you need to invest in very thorough security for your computer. High risk users should invest in an antivirus program that offers real time scanning of all incoming and outgoing connections or files, a firewall to prevent unauthorized access to your PC via an open broadband connection, a pop-up blocker that prevents your computers web browser from being hijacked and adware scanners that detect pop-up, spy-ware, tracking and redirection software.

Are you Purchasing for Business or Home?

Antivirus software manufactured for business and home can be two very different applications both in cost and effectiveness. Home versions generally cost less and come with fewer options than business based antivirus programs. Generally the home user does not need the added functionality built into business versions and as such, I would not recommend that a home user invest in an antivirus solution designed for business.

Good antivirus software designed for business is focused on security, both from external and internal threats, as well as ease of maintenance. Most corporate versions of antivirus applications allow for a central point of control over entire networks. Protection can be divided between internet or application servers and individual PCs. New software updates are generally "pushed" from a central application server through the entire network, allowing for simplicity and assure-ity of a network's protection. Most times, corporate versions of antivirus applications do not allow individual users within a network to make changes to their protection settings; this is of key importance when considering overall network security and stability.

As a business purchasing a corporate class antivirus suite, it is important that your protection extends to each individual user that will access your network. Exchange/mail and internet server protection is a must, as well as protection for mission-critical file and application servers. It is a good rule of thumb for IT managers within corporate environments to assume that all their users will do everything within their power to infect corporate equipment with viruses and threats. Though this most certainly is not true, assuming that users know how to protect themselves or their corporate computer environment from infection is in most cases professional suicide for the IT manger in charge.

Antivirus software for business is generally loaded with more options than software built for home, and as such is often times much more expensive on a whole. Usually business antivirus programs come as a server based application. Clients, or additional licenses, are purchased for each computer or user that connects to the antivirus server.