I'm having trouble with the serial connection of my UNO. I was making a wii nunchuk mouse, and had everything working. Then I unplugged the arduino for some reason, and when I plugged it back in to receive serial data, it wasn't working. I then tried to re-upload the sketch, and found that the com3 port couldn't be found. I checked the devices on device management, and it clearly shows the arduino uno com3. I have re-installed the drivers, used a different usb port, and reset the uno. I don't know what else to do, any suggestions would be appreciated. Thanks!