At this point, Vista is ready to share the default internet connection. This is probably the Ethernet connection, but we want to share the wireless card connection instead. On my Vista laptop, the wireless connection is called “National Access – Broadband Access."
Again, go to Start -> Control Panel -> Network Sharing Center, and then click on “Manage network connections." Right-click your wireless device and select “Properties." Vista may ask for permission to continue.
Click on the “Sharing" tab and select “Allow other network users to connect through this computer’s internet connection" and click OK.
And this sets up your portable hotspot in Vista.
To use it, first connect to the Internet wirelessly using the usual method on your laptop. Then once you’re connected, go to Start -> Connect To and click your new network name under Wireless Network Connection. If all goes well, Vista will report “The [network] is ready to use" and inform you that the network is broadcasting and will stay active until everyone disconnects from it.
Your friends and colleagues should now be able to go to their Network Sharing Center and find your new network listed under Connect to a Network.
Note that only one internet connection can be set up for sharing at one time. If you later decide to enable it for your Ethernet connection, you’ll need to go into Network Connections and Properties for your “Local Area Connection."