Call from "Windows Technical Department" saying they have a report of errors on my Windows computer. At least ten calls so far but this is the first time I have a telephone number for this mob of idiots. I have variously hung up, kept them talking for twenty plus minutes playing a frail elderly person (well, the elderly part is true!), asked if they're calling about the broken kitchen window, told them I have a Mac PC, told them I have NO PC but they still keep calling! I've reported them to the ScamWatch site. Is they any way to stop these calls?