I was just about to sit down to dinner when someone who sounded like he was calling from India (but claimed to be Brad from the Microsoft Technical Centre or something in London) phoned and said that he needed to do something to my computer to get rid of this DNS virus, with which my computer is apparently affected. I have only had this laptop for about 2 months and have been a good boy, downloading all the updates recommended by the HP support assistant and I have Norton also, but he said that none of these measures protect against DNS. I have not noticed anything untoward going on on my computer, and having just done a quick search on the net, it appears that we have passed 'D-Day', i.e. when the virus was supposed to bring down peoples' internet connections. I don't really understand any of this stuff and I couldn't suss out whether or not he was genuine, although he did give a name and London address and phone number. Not wanting to be 'had', I took these details and said that I would have to find out more before allowing him to do anything to my computer. So what should I do?