avrdude: ser_open(): can't open device "\\.\com3":

I upgraded to IDE 1.6.3 and rebooted. When I ran the IDE, I had the COM3 under the Ports but as soon as I try to upload a file to the Arduino, i get the error and the Port selection grays out. even after shutting down and restarting, the Ports are grayed out.

UGH !!!