It seems like an innocent, helpful and convincing telephone call: "There is a problem with your computer but we can fix it for you. Just give us a few details."
For many the alarm bells start ringing immediately. But sadly others - less 'computer savvy' - are taken in by the scam and don't realise it until their bank accounts are being drained.
That's what happened to a woman from Lymington, in Hampshire - the victim of one of a growing number of computer frauds aimed at unsuspecting people. Richard Slee reports.
In our regular update from Fixers - the campaign that helps young people make a difference - we meet a young woman from Basingstoke who's made it her mission to convert older folk to new-fangled technology.