Received a call from this number, but they left no message.

Call from "Windows Headquarters" because if I'm the owner of the computer, then they are calling about malicious software on my computer because I use facebook, do shopping online, watch movies, etc.
I asked if they are calling from Microsoft because it was from "Windows Headquarters" - They explained that Microsoft is a big company and don't have the time to call their customers so these folks are licensed and are calling from "Windows Headquarters"...
I said that they need to help me understand how "Windows Headquarters" was not related to Microsoft.
They hung up!
Block or Ignore

people have called9-10times claiming they are from microsoft windows its all bogus they are just wanting to get into your computer  do not even talk to them

I also received a call today...my caller ID said John. I wasn't home and message machine was off. I know a few John's but didn't recognize the number so I checked here and saw the other 3 posts. Glad for the heads up.

I got the same call with "John" listed on the caller ID.  Because of the area code number and only a first name, I did not answer.  No message was left.