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I got one of these calls last night. Unfortunately I had just come home from a 2 day drive from NYC (I live outside of Chicago) and was too tired to do much other than threaten the scammer with a complaint to the US federal authorities (pretty useless these days). We have no Windows systems (VMs or otherwise) in our house. Wife only uses Apple systems for home and work (she is a staff physicist at a major national laboratory - I think only HR uses Windows there), and I only use Linux systems (CentOS on my server and Mint on my laptop/workstation).