My laptop came with a free 90 day trial of Norton Antivirus. This is soon due to expire so i've been searching around for new software. Problem is, i aint made of money so i need something cheap or preferably a free download.

On the download front, AVG free doesn't really appeal and im leaning towards downloading the free version of Avast.

On the other hand, I noticed Norton Antivirus being sold for ?10 (around $20) in my local Gamestation Outlet (a video game shop). It was packaged and all, but is it trustworthy for such a cheap price? Especially as Norton appears to cost around ?40 online.

I am a basic home user that uses MSN, Limewire and surfs the internet alot. I don't download a large number of things. Any opinions or advice?

EDIT: Just remembered that I have Windows Defender, would this suffice once my Norton trial has expired?