All I can say is, when I heard the line about "I am calling you from Windows", I got angry. I figured you'd have to be doing drugs to believe that I would fall for this scam. Of course, HE didn't know that
"Yes you are. I know when someone is doing drugs and talking on the phone! And you sir, are doing drugs, and that is illegal!"
"Oh no sir, I am not doing that."
"Do you think I am lying to you!?!? I know what I'm talking about. How would your mother feel if she knew you were doing drugs!?"
"She would not like that."
"Well, do I have to call her? I will you know. I will call your mother and tell her that you are doing drugs and making phone calls for Windows!"
"Oh no sir, don't do that.
Really dude? At this point my wife is beginning to slide on to the floor. Anyway, I told him never to call me again and I hung up. Call didn't last a full minute, but it was absolutely hilarious. Never got a return call either.