Ask HN: Phone scam from “Microsoft”

I got a call from 949.486.6422, some not easily traceable VOIP, I'm guessing. "Microsoft" detecting viruses on my computer, called to help me remove them. I played along, nkt doing the steps but just saying I was to see where this was going, and they had me open the event viewer -> logs, show warning and errors and then delete them, telling me those were viruses. The connection. Broke up, but I'm wondering what their end game was. Anyone had this happen to them or heard of this? Were they going to charge me for "virus" removal?