Trivun said:
Unless you're using a free trial of something recognised that you'd normally pay for, can I just say one thing?
[HEADING=1]Do not trust freeware anti-virus programs.[/HEADING]
My reasoning behind this is that I've tried half of the freeware programs people have been listing and they've either not worked, or more often, caused more problems. Only use freeware if it's a free trial of a program that is widely recognised as being a good program, like McAffee or Norton. I use Norton 360 and although you have to pay a yearly subscription, it's the best anti-virus program I've used in a hell of a long time. I had a free year because it came with my laptop, after that ended I straight away paid the second year subscription. It's worked perfectly for me. But definitely don't trust freeware, it won't work, believe me.
Do not trust the red text!
Avast and AVG work quite well, and Avast! gives you all the software for spyware and so forth too, all for free. I used to run it myself. Though get Spybot Search & Destroy, it works great and helps protect your computer too.
I find Norton to be worse then viruses, it's like bogged down spam and nothing more.
I use AVG Internet Security 9 (which is the full package, with the firewall too), and it works great. The firewall is quite well made and does what I want, unlike many others I've encountered.