1 – The Arduino COM port is not recongnized. What should I do ?

You should update the Arduino driver. You can download the Arduino driver at this link drivers-arduinoIDE-1.0.6-x86.zip Unzip the folder and install the drivers.


Windows 8 OS driver digitally signed known issue
Sometimes Arduino is not recognized by Windows 8, because the driver is not digitally signed. In this case you should follow this tutorial