I like AVG it seams to offer good protection and has regular updates. AVG updates itself constantly - every time You switch the computer on. I've been using it for two years, and so far not one virus has got past it. It monitors for virus activity constantly , and also scans emails for viruses The only minus point is that the full system check does slow the computer down for about 20 mins, but I bet the expensive anti-virus packages do the same. Frankly, it's worth being patient with it for peace of mind. i would rate it as follows out of 10Value 10performance 9ease of use 10speed 7Highly recommended .