Received a call from 405-607-8405 after midnight.  The called identified himself as George from Microsoft and it was an emergency call.  He stated Microsoft was receiveing messages from my computer and there was a good possibility my computer was about to crash.  I'm not stupid so when he asked me to key some function on my computer to allow him to further check things out, I had a few choice words for him and asked for his full name and a number I could call to verify what he was saying.  He told me it was not a scam and to call back at the above stated number and his full name was George Williams.  Of course when I did so it was busy and when I called the number the next day some woman answered telling me I had a wrong number.  ("George's" voice was not very clear.  It sounded as if he was using some device to modify his voice).