Called and said that they were from Microsoft and that I had an issue with my computer to which I replied that I didn't have a computer (I have gotten these called befoer too)....silence.....click.
We just heard from these guys, same story. Receiving errors from "A" Windows computer, but couldn't provide 1 shred of verifiable information as to which computer was affected. I told the guy that he was wasting my time and hung up the phone.
When the "Windows" computer repair man phones, ask him to read off your Windows 7 product key to identify which computer it is. Every real copy of windows (1 to 8) has one. Don't let them off the hook so easy! India has GOT to get better jails!