A hidden wireless network is a wireless network that isn't broadcasting its network ID (SSID). Typically, wireless networks broadcast their name, and your PC “listens” for the name of the network that it wants to connect to. Because a hidden network doesn’t broadcast, your PC can't find it, so the network has to find your PC. For this to happen, your PC must broadcast both the name of the network it's looking for and its own name. In this situation, other PCs “listening” for networks will know the name of your PC as well as the network you’re connected to, which increases the risk of your PC being attacked.
If you still want to connect to a hidden wireless network despite the risks, you'll need to gather some info from the wireless router first. Use the following basic steps to gather that info. You can also check the documentation that came with the wireless router or contact the router manufacturer.
Gather the following info:
Network ID (SSID), which is the name that would typically appear in the list of available networks
Type of security (WPA, WPA2, WEP, or 802.1X)
Type of encryption
Security key
Connect to a network by swiping in from the right edge of the screen, tapping Settings (or if you're using a mouse, pointing to the upper-right corner of the screen, moving the mouse pointer down, and then clicking Settings), and then tapping or clicking the network icon (The wireless network icon or The wired network icon). Tap or click the network you want to connect to, and then tap or click Connect.
Tap or click Hidden network, tap or click Connect, and then enter the network info.
The network will be added to your list of networks and will be available to connect to in the future when your PC is in range of the network.