Received the same bogus phone call

Got a call from this number saying they were from Microsoft which I knew was a lie.  I spoke to the person on the line to see what they would say. The guy on the other end wanted me to turn on my computer so he could tell me the "extent of the damage" from the virus and then I could subscribe to their service (hunh). I asked what the company name was and he got flustered. He said it was "Microgeek" ??? Then I asked if there was a number I could call them back on and he got cagey. So I told him I thought he was a liar who tries to defraud people and he ended the call. I tried reporting the number to the FTC, but there doesn't seem to be a way to report these things if you haven't already paid for a bogus service.
I know it's probably smarter to just hang up on these people, but I enjoy telling them that they suck.

accidentally answered. Something about a problem w my computer. I knew it was a spoofed call as the CID as any exchange starting with a 1 is invalid

Bravo!  Ties them up and wastes some of their crooked time needed to find a sap that will give them what they are seeking!

In response to the author of 'Fake Number - safe to assume a robo calling telemarketer' - I have received a call from the same number, however, there is a live person with a heavy accent telling me there is a problem w/my computer & she would like to help.  I told her that I didn't believe her & hung up - because how would anyone know I'm having a problem, unless they get that info from a bonafide microsoft web site.  Scares!