Recently, my computer said a flagged IP was accessing my computer's network, but there was no one near me house, I went out and checked the radius, and then a CMD popped up and it said, "CMD Chat system version 1.2 DEVELOPED BY SPARTACUS" Then a message popped up saying, "Hello, I know your name, *******, and I know where you live." I obviously didn't state my name for obvious reasons of the internet. He then said that I had a choice to join them or stay in the lies forever. Any help?