If you have enabled sharing on your computers or devices, these people will be able to access them. If this is not possible, you can check whether the Router has client access to broadcast a secondary virtual network independent of the primary network. To check, log into the Router management interface and look up this feature.
There are also many ways to provide guest access, such as using virtual private network functionality in Windows 7. You can also use the Wireless Hosted Networks via Command Prompt or use an application like Connectify.
If you receive a prompt in the lower right corner of the Windows screen for a certificate when you make a connection to the wireless router, you may need to enable 802.1X authentication. This authentication requires an external server and is often used in enterprise networks. It will then allow the use of Enterprise mode of WPA or WPA2. If you connect to a router at home or a small office, you need to disable this authentication because you will most likely use Personal mode (PSK) of WPA / WPA2.
Here's how to check options in Windows XP:
This option does not appear in Windows Vista or Windows 7. You cannot activate authentication mode unless you select WPA-Enterprise, WPA2-Enterprise, or 802.1X mode as Security Type security. To do this, open the list of available wireless networks, right-click the network you want to connect to, then select Properties .
4. The connection must be made after restarting
You don't have to do anything with your computer or laptop to connect back to your wireless network after rebooting. The security key will be saved by Windows or the connection manager for the wireless adapter.
However, if you have installed another carrier's connection manager, but it does not work, you will probably have problems performing automatic reconnection at this time. If this is the case, try disabling the connection manager via the Add / Remove Programs utility in Control Panel . Look up the wireless carrier's name and remove the vendor related programs. This will help you keep the driver installed for the wireless adapter. If the problem persists, follow the manufacturer's instructions to reinstall their software.