If the small "L" LED on your board starts flashing, you are officially ready to build! Common Troubleshooting for Older Windows Versions
Open the Arduino IDE from your desktop. To make sure everything is working: Connect your Arduino board to your PC. If the small "L" LED on your board
: If the board isn't recognized, you may need to manually update the driver through the Device Manager . Right-click the "Unknown Device" and point it to the drivers folder inside your Arduino installation directory. : If the board isn't recognized, you may
Once the .exe file has finished downloading, double-click to run it. to the license agreement. to the license agreement
Go to and select the COM port associated with your board. Go to File > Examples > 01.Basics > Blink . Click the Upload (arrow) button.
: Downloading from the official site guarantees an untampered version of the installer. Step-by-Step Installation Guide 1. Download the Installer