I am wanting to know (in plain english; step by step) how I go about doing a virus scan? My hubby has done it for me a couple of times. He clicks on the the icon for avast & then does something else; but I don't know what. And then I reset my computer & when it restarts it does a virus scan in DOS mode (I am using Win XP) & it will go though everything that is on my computer. I want to lean to do this myself as I think it is a very important part of keeping my computer virus & adware free. My avast is 4.7 Home education. I have got the trail one but, am looking at buying it as it is so good. Even though it is free I have seen my hubby do the scan & want to have a go myself.