Definition of Computer Security Software

Computer security software covers a wide variety of potential risks, including hacker intrusions, destruction of data, harmful viruses, Trojan horses and other malicious attacks. Computer security software is available either within the computer's operating system or add-ons freely downloaded or purchased. Computer security software offers peace of mind amid a growing array of risks that increase exponentially as more PCs become accessible through the Internet.

Benefits

From email to newly installed applications, computer security software serves as silent guardians against an ever-changing landscape of threats. Once devoted simply to controlling access to the physical computer, modern computer security software oversees virtual access, including online and even "holes" in the computer's operating instructions. Without security software, computers are an open invitation to hackers.

Types

Computer security software is divided into two broad categories: antivirus and access control. Each type of security software addresses specific threats. Antivirus software protects against the spread of malicious code designed to either disable or interfere with a computer's operation. The most dangerous computer viruses attempt to take control of a computer or an entire network. Antivirus software works by looking for specific "signatures" that identify a computer virus, then delete or quarantine the threat.

Features

Today, the greatest threat to computers comes from attempts to alter access privileges, providing hackers a "master key" to your most important data. The most common tactic is through a Trojan horse. Like the historical example, hackers use Trojan horses to hide harmful instructions inside innocuous downloads. Once installed, however, a Trojan horse payload may seek out passwords and financial data, transmitting them to a remote location. Current computer security software is designed to meet both threats.

Options

The most common computer software is freely available. For home Windows computers with just one user, AVG Anti-Virus Free Edition is a good option for instances where more complex security suites may not be necessary. ZoneAlarm acts as a firewall, blocking many online hacking attempts. Both McAffee and Symantic offer subscription-based computer security software. McAfee's Total Protection 2009 suite guards against viruses, detects and removes spyware and checks email links.

Options

Symantec' s Norton Internet Security suite protects against viruses and spyware, but also blocks access to sensitive data prized by hackers. The subscription-based security software encrypts passwords and financial data while also alerting you to potential phishing scams. Symantec's security suite costs $69.95 per year for up to three users. McAfee's Total Protection 2009 cost $39.99 per year for up to three users.