No you don't need software installation.
To connect to your wireless router, the router's wirelesssettings needs to be configured with the SSID, encryption etc. and also thewireless cards in all the laptops/computers needs to be configured with theserouter's wireless settings. Then the laptops/desktop computers can communicatewith your wireless router.
Connect a LAN cable from the Linksys to the LAN port on your computer.
Open a browser and enter the Linksys configuration URL
The default login = admin
The default PW = admin
You can protect your router by changing the default admin PW (write it down andput it in a safe place)
Go to the wireless configuration and set up the SSID and WPA or WPA2encryption.
Apply these settings to the wireless card in your laptop/computer.
To secure your wireless network from unauthorized access, please click on thislink and follow my instructions :-