New computer viruses, Trojans and worms appear everyday. They not only drastically affect your computer's performance but they can lead to serious security breaches. CoGen Anti-Virus provides continuous protection via a Virtual Machine Unpacking Engine (VUE) that detects viruses 24/7. It also features a Memory Monitor, Script Blocking, Email Scan, Spam Filter and Screen Saver Scan.

This virus checker not only does a good job - popup alerts tell you of any suspicious activity but it's also one of the best looking virus checkers I've used. The sleek black interface really gives it a classy look and all the major scanning actions are easy to find. The best feature is the Auto-Protect feature which instantly detects that a network computer is attempting to spread a virus. It's integrated with a Network Blacklist that will intercept the virus and record the name and IP address of that computer. If you're on a network, other computers can be manually added to the list too so there's no danger of the virus spreading. All-in-all, a comprehensive and powerful virus checker that's only let down by the lack of updates for definitions.