Windows 8 comes with a nice little security ‘feature’ that ‘protects’ you from unsigned driver installation. If you’re running Windows 7, Vista, or XP, you’ll need to install some drivers, so head to the Windows 7, Vista, and XP section down below. If you’re running Windows 8, you’ll need to disable driver signing, so go see the Windows 8 section.( this diagram shows the placement of the power LED on the UNO). You should see the an LED labed ‘ON’ light up. Power up your Arduino by connecting your Arduino board to your computer with a USB cable (or FTDI connector if you’re using an Arduino pro).The file structure is important so don’t be moving any files around unless you really know what you’re doing. When the download is finished, un-zip it and open up the Arduino folder to confirm that yes, there are indeed some files and sub-folders inside.Go to the Arduino download page and download the latest version of the Arduino software for Windows.

This page will show you how to install and test the Arduino software with a Windows operating system (Windows 8, Windows 7, Vista, and XP).

How to download arduino ide software