Download the Arduino Studio
Start Arduino Studio
Double click on the executable in the unzipped folder.
(Note: the language will be the same of your operating system.)
Connect the board
Connect the Arduino board to your computer using the USB cable. The green power LED (labelled PWR) should go on.
If code completion does not work when you open .ino files, check if the selected language in Arduino Studio is "Arduino".
If it's not, select it. Then, click on "Set as Default for .ino files".
Open the Blink example
Select your board
Select your serial port
Select the serial device of the Arduino board from the Tools > Port menu. This is likely to be COM3 or higher (COM1 and COM2 are usually reserved for hardware serial ports). To find out, you can disconnect your Arduino board and re-open the menu; the entry that disappears should be the Arduino board. Reconnect the board and select that serial port.
Upload the program
Now, simply click the "Upload" button in the environment. Wait a few seconds - you should see the RX and TX leds on the board flashing. If the upload is successful, the message "Done uploading." will appear in the status bar. (Note: If you have an Arduino Mini, NG, or other board, you'll need to physically present the reset button on the board immediately before pressing the upload button.)
A few seconds after the upload finishes, you should see the pin 13 (L) LED on the board start to blink (in orange). If it does, congratulations! You've gotten Arduino up-and-running.