Caller gave the name John and claimed to be calling about technical support for my computer.  I told him I didn't call for computer support.  His reply, "Your computer is causing errors reported on the main Windows server."

Smells phish-y.

You better watch out.

Multiple calls from "Unknown" number, regarding computer support, supposedly from Microsoft, indicating that my computer is sending out viruses to their servers, but very cagey about what it is that he wants me to do. Name of Kevin. When I asked for a Microsoft number to call him back on, cagey, but eventually gave (408) 641-3699, but then indicated that it would be better for him to call me back, ie. not to try calling him on the number he gave. Very fishy.