I've not come across this one before, but I do know that Microsnot wouldn't give a tuppeny damn if your PC were infested, if clearing that cost them ten pence for a phone call.

They give you the option to use their Malicious Software Removal tool, about once a month, as part of an update, and that is genuine.

The chance of your young caller being genuine is slim to none, and Slim's out of town this month.

Don T.