The scam always starts the same way: the phone rings at someone's home, and the caller – usually with an Indian accent – asks for the householder, quoting their name and address before saying "I'm calling for Microsoft. We've had a report from your internet service provider of serious virus problems from your computer."
Dire forecasts are made that if the problem is not solved, the computer will become unusable.
The puzzled owner is then directed to their computer, and asked to open a program called "Windows Event Viewer". Its contents are, to the average user, worrying: they look like a long list of errors, some labelled "critical". "Yes, that's it," says the caller. "Now let me guide you through the steps to fixing it."
Courtesy of guardian.co.uk