I got a call from this number on Christmas Eve saying that he was from Microsoft and that my computer was sending their server messages that my computer was infected.  He told me that he could help me fix it.  I told him I was not at home and I would call him.  He attempted to call again but I did not answer.  He called me today again saying the same thing.  I did some research and found that Microsoft rarely would call and say there was a problem with your computer and that calls like these were scams.    Then googled the number and found these comments.