It may have physical switch or a keystroke sequence. As it is brand new it will be in the manual. (The manual may be soft copy rather than paper.)
T
August 2009
Try Settings - Control Panel - Network Connections and right click on the Wireless Icon - select View Available Wireless Networks (you may see several) connect to your own.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix notebooks/laptop pcs.