Nothing like getting a call from someone who wants you to mess around on your computer and give them the IP address. No thanks, I'm well aware windows would not call and appear as "rozykhatoon25" - it's not professional enough to even mark down as a proper scam.
Called and said they were from Microsoft and receiving error reports from my computer that is was accessing viruses. Asked if I was aware of the problem and said every time my computer is used Microsoft receives these messages. I told them my computer is fine and hung up.