Have you tried restarting the computer? Are you using the Arduino IDE compile button or the upload button? Do you have the Arduino device connected to the computer? What do you see on the computer screen during the 30 minute timeframe?
Have you tried restarting the computer? Are you using the Arduino IDE compile button or the upload button? Do you have the Arduino device connected to the computer? What do you see on the computer screen during the 30 minute timeframe?