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Various ISPs and IAPs offer the option of a portable and mobile WiFi modem that you can use to connect a number of devices to the internet. It is possible however to tether one of your own devices for example a laptop connected to the internet. And contrary to popular belief: Windows does have a command line shell-cmd. My bounty of $50 000 for the guy who removed the telnet utility from Vista upwards is still good but I divagate.
• Open the run box by pressing: Windows Button+R
• Type cmd and press enter
• In the shell enter the following command and press enter: netsh wlan set hostednetwork mode=allow ssid=network_name key=network_key
N.B Replace network_name and network_key with your desired network name and key respectively.
• Now to start the network type the command: netsh wlan start hostednetwork
• To stop the network use the command:netsh wlan set hostednetwork mode=disallow ssid=network_name key=network_key
• Open network connections and select network_name, right click on it and select the sharing tab.
• In the sharing tab check the Allow other users to connect to the internet using my computer.
It is that simple!
source:.techzim