I have an arduino from RadioShack and I just downloaded the latest program from Arduino. This problem has been there many times but now I'm sick of it can anyone help me? Here is the error message:
Arduino: 1.6.7 (Windows 7), Board: "Arduino/Genuino Uno"
Sketch uses 1,030 bytes (3%) of program storage space. Maximum is 32,256 bytes. Global variables use 9 bytes (0%) of dynamic memory, leaving 2,039 bytes for local variables. Maximum is 2,048 bytes. avrdude: ser_open(): can't open device "\.\COM11": The system cannot find the file specified.
Problem uploading to board. See http://www.arduino.cc/en/Guide/Troubleshooting#upload for suggestions.
This report would have more information with "Show verbose output during compilation" enabled in File > Preferences.
I would apprciate any help that I could get.