It has nothing to do with having Microsoft on your computer, or with Microsoft at all. These are scammers calling random numbers. I know some elderly people who received the call who don't even OWN a computer.
Reporting incident to FCC for harassment. Incident was as others have reported. Caller lied and said they were calling from Ohio, which they were not, the call was the same Delaware number everyone above has recorded 302-129-7898.
Claimed to be my alarm company. Said that they "see where I have had my alarm system for more than three years"... funny...I am in a new house that did not exist three years ago. Told them that and they hung up.