It is also recommended to check the manufacturer of the router to make sure that the firmware is current.
Right click on your wireless network adapter and select “View Available Wireless Networks”

Toshiba Wireless Adapter

Select your wireless network.
Enter your password to authenticate into your network if you have setup a password (WEP/WPA). Refer to your router owner’s manual for more information about encrypting your wireless network.

Toshiba Wireless Adapter App

If Windows does not detect a known active wireless network. You may have a defective wireless adapter. If Windows does detect a known active wireless network but does not detect your network, then consult with your router’s manufacturer.
Toshiba offers a diagnostic tool called ConfigFree which helps users to identify the possible problems with your wireless connection.
For more information on ConfigFree, please click here