I just got the same call about MS Error message except it was an Indian lady. I caught on real quick the weird number was obvious. I just said what computer? I don't have a computer! lol I can't beleive people fall for this crap.
Also just got a call on my cell phone. A lady with a strong Indian accent saying she was calling from "Technical Support, a Microsoft Certified company" about "a reported incident with my Windows operating-system computer." I told her she had the wrong number; she was very polite, apologized and disconnected. She's just doing her job, but she probably works for a crook.
I got this call today and said hello twice. The caller said "Shut up [***]." Stunned I said hello again and then said "Is anyone there?" They said "Mm hmm." I said "Who am I talking too?" They said. "Shut up you [***]." So I hung up. Weird stuff.