The caller said he was with Microsoft and that someone was using my computer and they were getting all sorts of signals from it.. He wanted me to log on my computer so he could connect to it to come through the back door of my computer to fix the issue. Scam. He has tried several times to get me to log on to my computer. The first time I unplugged it for a few days and blocked his number. After I plugged my computer back in after having it unplugged a few days he is now calling back from another number. I just blocked that number.