Please click here Arduino IDE Download to get Arduino IDE.
Install Arduino IDE by running arduino-1.8.5-windows.exe. Once you finish installation, you'll be able to see this symbol from your windows task bar.
Please click Arduino IDE from your task bar to load Arduino IDE window.
Please write sample code into it.
File - Save save your sketch to somewhere.
Verify button click : compile your sketch
Upload button click : upload your sketch to Arduino Uno
If your Arduino Uno's pin 13 is blinking with 1 second delay, your job is done well!