I looked at another site and this "David Ross" is, apparently, just a name to get you at ease. Other sites say when they answer someone with a bad Indian Accent says they are with Microsoft and they've detected malware on your computer and want to take control of your box and probably install their own malware and then most likely charge you a bunch to remove it. Yeah, like Microsoft is going to start calling people because they can "detect" malware on your computer, and they use "David Ross" on their caller ID instead of Microsoft, and they use semi-understandable people to make unsolicited calls. If you believe this, then maybe the guy selling rights to the Brooklyn Bridge should give you a call. :( Forewarned is Forearmed.!