no prog ever gets 100%
http://www.pcpro.co.uk/labs/155/antivirus-soft ware/products.html
avg always scores well in the value for money section (as you'd expect) ... but not in detection. (in recent tests it scored only 83%) ....
http://www.pcpro.co.uk/labs/120451/avg-antivir us-free-edition.html
the free version scans for viruses ... but doesn't have real time protection .... so the time taken to neutralise the infection depends on the user's scanning timetable
AVIRA is now the freebie "darling" in the mags (PCPro & PCW) with a 92% detection rate
but again ... no real time protection
http://www.pcpro.co.uk/labs/120448/kaspersky-antivirus-7.html
all the bought versions DO provide real time scanning
Kaspersky scored 98% (the kasdpersky engine is also used by steganos which costs less and got the same results)
and Noron 360 is on the most wanted list for PCPro (it IS expensive though)
http://www.pcpro.co.uk/reviews/110678/norton-3 60.html
the mags generally don't have an axe to grind .... and test quite thoroughly - my money is with them ... their recommendation is far more reliable than ours in this sort of area
It all depends on you habits ... if all you ever do is listen to the archers .... and do a little banking ... a freebie is sufficient
if your tastes are a little less conservative ... real time scanning starts to look a little better
and there is a school of thought amongst security professionals that says ... as long as you