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!
Have had two calls in two days - Women said that she was responding to my request for a security check on my computer. I explained that as we were speaking, I googled the number and knew it was a scam. She insisted that I had requested assistance from Windows Messenger - REALLY? How can they do this?