The best line of defense against computer viruses, spyware, hackers and spam is BitDefender 2008, our #1 ranked anti-virus software and winner of "TopTenREVIEWS Gold Award." BitDefender 2008 is an outstanding product with a user-friendly interface that will scan all existing files on your computer, all incoming and outgoing emails, IM transfers and all other network traffic.

Kaspersky is an easy-to-use program for the average person with plenty of customizable options for an advanced user. Just install and set up this software and you'll never have to worry about a virus or worm infecting your computer.

Nod32 is a first-rate antivirus program that offers several levels of superior protection. However, the product is somewhat hard to understand because of the technical jargon and wouldn't be our first choice for the average home user.

Get real-time monitoring and antispyware protection with Trent Micro Anti-Virus plus spyware. Formally known as PC-Cillin, this program comes with free email, chat and telephone support and works with all versions of Vista.

F-Secure AntiVirus is a user-friendly program loaded with scanning capabilities that will keep your PC secure and safe. This suite provides registry startup protection and screens emails and instant messages-to name just a few of its defensive features.

McAfee is an industry leader in computer protection and VirusScan is their #1 defense against viruses. This software comes with a ScriptStopper, to prevent virus to propagate from one computer to another via email, and WormStopper.

Norton, a big player in security software, offers competitive antivirus protection. The AntiVirus 2007 suite is easy to use and has extensive security features to protect your PC from malicious programs. Some of this protection includes instant messaging scanning, script blocking and POP3 and SMTP email protection. However, this software doesn't provide protection from P2P or file sharing transfers.

AVG Anti-Virus has everything you need in an antivirus program: email scanning to include email attachments, boot scanning and auto updating of the virus definitions. From the basic interface, you can quickly do one of three tests: the Complete Test, Removable Media Test and Quick Test.

Formerly known as eTrust EZ Antivirus, CA Antivirus is an easy-to-use program that's good for computer novices and does a good job protecting your files and your computer from viruses. This software doesn't scan for riskware, adware or spyware.

We rated Norman Virus Control as a "very good" antivirus program. It passed the Virus Bulletin and ICSA 2007. This software isn't as user-friendly as some of the top-ranked products and may be difficult for computer novices.