However, if your laptop or desktop computer has a wireless network card then it could be connected to another PC in your house, provided the other one has wireless capabilities too. And you don’t need a router to establish this connection. This is known as an ad-hoc network connection. Here are the steps to setup an ad-hoc home wireless network in Windows Vista.
Go to Control panel and click on Network and Sharing center icon.
On the left side under Tasks, click on “Set up a connection or network” option.
Now click on “Set up a wireless as hoc (computer to computer) network”.
Click on Next button.
Now give a name to your network. The default security type should be WPA2-Personal. Let it be like that because WPA2 is much better than WEP when it comes to wireless network security. Choose a security passphrase, click on save network if you intend to use this network again, and hit next.
Your network will be build successfully. Now you can connect any Wi-Fi enabled device to your computer. If you search for available wireless networks, you will find a newly built network (“My network” in this case) on your device. In this way you can access and transfer data between your wi-fi enabled phone, printer, laptop and computer. A simple and easy method to setup an ad-hoc network.