Testing anti-virus software is a tricky endeavour at the best of times, due to the inherent nasty nature of the test subject. For this anti-virus roundup, we asked independent anti-virus testing lab, AV-Test.org (www.av-test.org) to conduct the testing for us in their controlled environments. AV-Test.org has access to thousands of viruses, and is a respected anti-virus testing lab.

Got a PC riddled with more viruses than a bus driver’s armpit? The PC Authority Labs team has tested 10 leading anti-virus packages to see which ones really deliver the goods and keep your PC clean.

We've had a quick play with the new version - and we like what we see. Definitely one to stick in your PC toolkit for 2008.

AVG offers a free home user edition with free updates for the life of the product and that has made it popular with a lot of home PC users looking for a cheap anti-virus solution.

Sophos Anti-Virus is clearly aimed at the enterprise market, with the minimum purchase being a 10-user licence, renewable annually. Unlike some of the other packages, Sophos is available for most operating systems including Unix, Open VMS, NetWare and Macintosh.

While this Spanish anti-virus program is hardly a household name in Australia at present, it is gaining in popularity through its availability on the internet. Its low cost (around $78) and plentiful features have been a strong selling point for people looking for something a little less expensive than the popular Norton or Trend Micro products.

One of the original anti-virus programs, Norton AntiVirus is one of the trusted standards. The current version is extremely easy to set up out of the box and, if you are regularly connected to the Internet, it will automatically keep itself up to date.

Norton AntiVirus (NAV) remains the world’s most popular anti-virus program -and for good reason. It is the ideal set-and-forget anti-virus protection that is as close to idiot-proof as anyone has yet got. However, it is not the cheapest and some of its competitors, such as PC-cillin now offer more for the money.

Norman Virus Control is a very unobtrusive anti-virus program that sits in your system tray and performs much like Norton AntiVirus from Symantec. It scans all incoming emails, new files, removable media and downloaded files from the internet as a matter of course without any user interaction.

PC-cillin is no longer just an anti-virus program - it is a full internet security suite that includes a personal firewall and spam filtering - and it costs between $20 and $40 less than the equivalent Norton product.

'Absolute consistency' are the words we'd use to describe the performance of the Aspire T310. A solid all-rounder, this machine is just as at home gaming as it is doing 2D tasks, such as productivity applications, anti-virus scanning or media decoding. And, as shown by its impressive 4,271 PCMark04 score, it's not short on horsepower.

Kapersky Antivirus has been around for some time and often pops up on home computers as the uneducated user’s anti-virus software of choice. Unfortunately, it really isn’t as user friendly a program as it should be for novice users.

Before widespread use of the Internet, computer viruses were not a common occurrence. Viruses could only be transferred via floppy disk, which meant that it was quite easy to guard against them

McAfee puts out its VirusScan 2004 in two versions - boxed or downloaded and managed from the internet. Whatever way you do it, the installation is simplicity itself with no difficult questions to answer or confusing choices to make.

Qatari news broadcaster Al-Jazeera -- sometimes called the Arab CNN -- has again been hit by hackers, with its computer network compromised by trojans causing Denial of Service (DoS) attacks on its global customer base, including in Australia.

While the $2500 price ceiling means you're usually picking up larger form factored notebooks with an average 15in display, some manufacturers like Apple and Twinhead have put together smaller ultra portable 12 inch models for those who value size over all else.

Unlike many of our performance-based Labs, business workstations are a whole different world of PCs, focusing not on the maximum number of frames per second, or how many overall points they can churn out in any given benchmarking utility.