Oh there you are. Perfect! At first, we have to download the Arduino software. We will use it to program the Arduino board. In the next unit I will explain what that is.
Go to https://www.arduino.cc/en/Main/Software and download the current Arduino Software. If you are on Windows, choose Windows Installer, if you are on a Mac, choose Mac OS X.
After the download you have to run the file and the installation will proceed.
Did the installation went well? Great! Now you are ready to take off.