Your HP laptop comes with a wireless adaptor which you can enable or disable. Network administrators occasionally disable wireless adaptors if the user primarily connects to the network using a hard-wired connection. You can't connect to wireless networks if the wireless adaptor is disabled.
Click the Windows "Start" button on your laptop. Click "Control Panel" to open the Control Panel window.
Click the "Network and Internet" link in the Control Panel. In this window, click "Network and Sharing Center". On the left side of this window, click the link labelled "Change Adapter Settings".
Right-click the "Wireless Adapter" icon and select "Enable". The large red "X" is removed from the wireless adaptor icon, indicating that it is enabled.