However, have you thought of going open-source to secure your system? There are good reasons to go with free and open-source ...

We’ve tested and ranked the best free antivirus apps ... putting antivirus tools, security suites, and all kinds of security software through their paces.

As well as providing the standard anti-virus protection, the Avira Free security suite also provides a software updater, as well as scanning your network for vulnerabilities and helps you fix them.

Retail bank Barclays is offering free security software to its two million online customers. Barclays.co.uk users will be offered the security software free of charge for download from the web site.