ive just had some demented lowlife on the phone trying to talk me through doing some bizarre caper with my computer and when i refused he said my computer would be dead within two hours,when i asked him where he was based he said london,when asked where in london he said east london,when asked where in east london he became defensive and hung up....should i take my computer down to the shelter and hope that the end of the world passes me by? 

) to plant some spyware on to get bank/credit card etc. log-in details.