Arduino Yún wifi network not appearing in my available network on windows 8.1

i'm connecting my Arduino Yún to my laptop via USB cable and as i read in Arduino documentation:

When you first power on the Yún, it will create a WiFi network called ArduinoYun-XXXXXXXXXXXX. Connect your computer to this network.

but in my case nothing appear and i didn't found anything related to this on the web.

i'm running windows 8.1 on my laptop.

any idea how can i solve this problem?