text: is norton better then avast and avg anti-virus as far as keeping the computer clean of viruses?   hi there,  instead of all these "mine is better than yours" answers that go on around here, i'll instead answer with the facts.  quite simply - yes, norton is much better than avg and avast.  looking at current protection ratings, avg scores a lowly 90% protection against all known viruses, whilst avast comes in at 92%.  this means they are letting through one in every ten viruses - pretty shocking.  norton on the other hand is protecting against something like 98.3% of all known viruses - a much better score.  however as people have mentioned, norton is know for being a very heavy program which can tend to slow down certain machines.  if you are thinking of installing norton i would definitely recommend you download their free trial to check it does not affect your machine in this way prior to opening your wallet.  if you would be interested in other security products that are better than norton, you should try either prevx1, kaspersky or f-secure who all score over a 99% protection rating.