AVG antivirus has always been my favourite anti-virus program and I have been using it for a very long time. AVG Technologies (formerly Grisof)has come out with the latest version, AVG Internet Security 8.0, which consists of Anti-Virus, Anti-Spyware, Anti-Spam, Web Protection and Firewall. It costs £39.99 (inc. 17.50% VAT) for a 1 year subscription and £59.99 (inc. VAT) for 2 years.
If you just want the anti-virus it will cost you £29.99 inc. VAT for a 1 year Subscription and £39.99 inc. VAT for a 2 years Subscription.
Fortunately, a free version - AVG Anti-Virus Free Edition 8.0 (latest version : 8.0.138) is still available.