They are scam artists. It is someone claiming to work for "Microsoft technical support". He claimed that my computer sent them a message saying that something was wrong with it. I proceeded to inform this person that I knew that Microsoft does not call people, there was no way my computer can send a signal to anyone without my permission, and that he was 100% a scammer. He hung up before I finished saying "don't call here again"
This number pops up on the caller ID EVERY day ... and just like Linda, it's John W. Williams calling...we don't answer and he doesn't leave a message! VERY annoying!!!