Unsolicited caller claims to  represent windows. And says my computer is emiting infections. And he must get into my computer to eliminate the problem. Threatens to cancel my windows service  if I refuse.
Represents Supremocontrol. He went away continually threatening as I continued to refuse. Foreign voice.

So glad you didn't fall for it.  It's the microsoft/windows scam.  They've stolen millions from the gullible.
http://answers.microsoft.com/en-us/protect/fo ... cd6ad196?auth=1

I also got a call from this number and that guy told me he is james smith from microsoft and my computer is constantly creating some junk files and he is getting intimation and if ill not cooperate him to resolve this my computer will be crashed till next morning. i had a doubt on him because because he could not confirm my computer ip or anything else and i immediately checked on google and it was confirmed that he was fake caller.

Hi All,
Feb 21, 2017 @ 3:35 pm received a call from "James Smith" @ Microsoft indicating that my computer is emitted an error message. I was told that I have 34 hrs to call him back or my computer and IP address will be infected. This individual had a heavy African accent and was calling from 1-510-351-8576 but I given this call back number 209-890-8727.  I hope this helps anyone who receives this kind of call.