bitdefender

AVG free 8.5

Linux.

Common sense.

NOD32

None right now. I've used Kaspersky and Norton 2008 b4 though.

also mcafee its cheap reliable and registrtion is not more complicated than ordering nuclear submariens from the russians (norton *cough*)

I use AVG Internet Security 8.5 (not the free edition as it's not that good tbh) and it really is fantastic and won't slow your pc down at all, my pc came with mcaffee which was the worst thing i have ever used so that got uninstalled, I then tried Norton 360 and that slowed my pc down very badly so then tried AVG 8.5 and liked it so much I bought a subscription for 3 pcs, (my pc, g/f's laptop and parents pc) for about £25 for a year.

Also worth noting, My mum and dads pc had 11 viruses (yup, they click anything lol), norton and mcafee only detected 3 and 5 respectivily, norton could only remove 2 of the 3 it found, AVG found all 11 viruses and a load of spyware and got rid of it all, their pc has been fine ever since.

AVG 8.5 is a LOT better than the free AVG, give it a try as there is a 30 day trial :)

McAfee, I get it for free with my isp. A software firewall and a hardware firewall as well as firefox with various attachments. My other PC is a linux, so just the hardware firewall because it's connected to the modem

Bullgaurd. They also have a gamers edition which takes up less resources and has a database of games so it doesn't interfere too much, although I didn't know that when we got the license.

Seems to update virus definitions almost every 2 hours.