I have received some calls from similar sketchy individuals telling me my computer was sending out viral E Mails. I listen for a while then try to take the persona of an elderly European immigrant. I tell them there mother would be ashamed of them trying to steal peoples money. That they are a bad thief. It is amusing for 5 minutes or so.Never has any effect. I figure at least while they are talking to me they are not calling up someone else and doing real damage.