Slim is right on with this info! It is not microsoft, its a scam.. The only persons who should be touching your computer is you, your manufacturer, Real Windows support that you have called and/or maybe a real live tech you see face to face!
I received a call from (801)783 1263. A man, who said his name is Eric. When he wanted me to go to my computer, so that he could check it. I made up an excuse, took his number and got off the phone.