Free anti-virus software can be a mixed bag - sometimes they can do more harm than good while at others, they can save you hundreds of dollars with solid real-time protection.

Avira AntiVir PersonalEdition Classic is the free version of Avira AntiVir PersonalEdition Premium. This doesn't mean that it's any less powerful bit it does mean that many advanced features are unavailable. The program can scan up to 30 different file types and seems to have been designed with a particular focus on Trojans according to the developer blurb. Protection is served in real time and as with all virus scanners, you are immediately given the choice whether to ignore, quarantine or delete the infected file. What's nice about this scanner is that for those viruses that it can't identify or clean, it compiles a report which can then be automatically submitted to Avira's lively user forum where someone, somewhere, should be able to help. The scanner sits in your system tray bit can be expanded to show the current settings and the status of any scans in progress. Scanning is quick and it doesn't slow your machine down significantly. Unfortunately however, it provides no option for scanning incoming and outgoing mail or adware/spyware but if you're just looking for a trojan blocker/remover, it's a very solid product.

A powerful and well organised anti virus scanner that helps you get to the bottom of virus issues rather than hinders your progress.