I've received a couple of calls of the same kind at home, typically on Saturday mornings. (I'm in the UK). Though I was very surprised to get the same call ove

I've received a couple of calls of the same kind at home, typically on Saturday mornings. (I'm in the UK). Though I was very surprised to get the same call over December in South Africa at my parents house (I recognised the script). Thought it was unusual. But seeing this one is a regular issue in Australia, I wonder how many other countries these people are targetting. How wide are they reaching? I played along with the first one - despite not having a Windows machine, and when they failed to figure out I had no Windows key on my current keyboard (old style Thinkpads don't), I got put through to a different person who told me I needed to see a doctor because I was blind, and then he hung up on me. In later calls one of them was shocked I declined to follow their instructions, claiming it was a free service check. Another one got very nasty and abusive.