Oh boy, another call from the obviously fake type of number that "Windows Support" people and "IRS" people use to tell me I have a serious problem!  This one was the one where they say there is a problem with malware on my computer.  I was in a bad mood so felt like venting a bit.  And I am curious - it seems to me that if I were making such calls and got the hostile response like the one they heard from me, I would disconnect.  But they don't do that.  They seem to want to keep talking even in the face of disbelief and/or hostility.