Grisoft has announced that the firewall element of its paid-for AVG Internet Security 7.5 solution is now compatible with Vista.

While other elements of AVG's security software, including its anti-virus and anti-spam tools, were ready for the January launch of Vista, the firewall component was not.

The update announced this week is claimed to be one of the first to take advantage of the network-filtering benefits provided by Microsoft’s new Windows Filtering Platform. This works with firewalls to provide a stronger filtering system.

The software, which costs £42 for a two-year subscription, also combines anti-virus, anti-spyware, firewall and anti-spam defences with free customer support and comprehensive remote administration tools.

Larry Bridwell, vice-president of global security strategies at Grisoft, said: "Our developers had been working with Microsoft prior to the Vista launch to ensure product compatibility throughout the new security infrastructure, and to design the best user experience possible."