Five minutes ago, I received a phone call from a man who claims to be "David Johnson" who said he's working from Microsoft. He had an accent that I was unable to identify, but I assumed he was from India. His phone number showed up on my cell phone as "212-414-155" (that's right - -- it's missing a digit). He told me that MY computer has been throwing out error messages that are being received by the Microsoft Server, and that we need to fix the problem. I led him on a bit. He said to hit the control key plus r, and that this is the beginning of the fix.
I asked for his phone number. He wouldn't give it. He repeatedly said that he's working with Microsoft, not FOR Microsoft. He wouldn't give me his supervisor's name. I repeatedly asked for his PHONE NUMBER so I could call him back (I wanted it to report him to Microsoft). He wouldn't give it. I offered to add Microsoft to the call, and he got evasive.
My assumption is that he was trying to have me give him access to my computer by installing monitoring software. I eventually called him a "criminal," and told him he was despicable, then ended the call. I recorded most of the conversation. Beware . . . . I'm including a link from Microsoft regarding phone scams.