I a new user for Arduino. I've been playing with the starter kit (Arduino UNO board) doing the sketches.
When I try to use de Serial Monitor to see how an analog's signal changes, an error message shows up saying that there is not a board connected to COM1, which is strange because I can upload the sketch to the board without problems.
I am using Windows7 64bit.
At the beginning I could not communicate becase the Arduino was at COM12, so I changed it to COM1 in the device manager.
By the way, I forgot to say that I also updated the driver, and still have the same problem... Communication with the board is OK to upload the program. Impossible to run the Serial Monitor.
It is not a good idea to change the COM port number to 1 because many computers do have at least one com port installed. Hence giving you access conflicts.
Find out how many serial ports your computer provides (say "n") and then change the COM port number of the arduinos port to n+1.