71D-Link DWR-555 User Manual
Section 5 - Connecting to a Wireless Network
Configure Wireless Security
It is recommended to enable wireless security (WEP/WPA/WPA2) on your wireless router or access point before conguring your wireless 
adapter. If you are joining an existing network, you will need to know the security key or passphrase being used.
2.  Highlight the wireless network (SSID) you would like to connect to and 
click Connect.
1.  Open  the  Windows
®
  Vista
™
  Wireless  Utility  by  right-clicking  on  the 
wireless computer icon in your system tray (lower right corner of screen). 
Select Connect to a network.