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?
DO NOT follow any instructions given by any such caller, including visiting any websites you are directed to. Such instructions will certainly be designed to GIVE you a virus, not fix one.
No tech support department will ever call you up like this. I doubt Microsoft has your contact details.
These attempted scams are still pretty crude but they are improving and will start to fool more and more people. Some golden rules include ...
ALWAYS have your Windows Update software keep your PC up to date
KEEP your passwords, strong/complex, secure and private
DOWNGRADE your main user to remove Administrator rights, keeping a separate logon for making one off changes
ALWAYS use a good AntiVirus package. AVG do a free one, most consultants (self included) would recommend NOD32 from an Australian company called ESET, largely because it is updated regularly, is lightweight and doesn't bog your PC down and because it's generally among the first to catch the "zero-day" exploits (new malware)
NEVER follow a link in an email, even if it's from someone you know, without at least copying the link and checking that it goes to where you think it's going
PAY ATTENTION when your computer asks "This software is asking to install this piece of cr@p, do you want to allow it" - especially browser add ons
BEWARE that if you use a public WiFi your traffic is unencrypted and can be snooped by anybody who cares to listen, including any passwords you use.
There are many other golden rules - happy for others to jump in ...