Have you ever connected to a wireless network at a friends’ house and could not access the Internet, even though you were connected? Did Windows 7 tell you that there is no Internet access? If the answer is yes, then read this article to find out how to troubleshoot and fix this issue.

How to Tell You Don’t Have Internet Access

The first sign is shown directly by Windows 7: the wireless connection icon in the taskbar has a yellow exclamation mark on it. If you keep your mouse over it or click on it, Windows 7 will say it has no Internet access.

Another obvious sign of no Internet access is being unable to visit websites in your browser. Accessing websites simply does not work.

Troubleshooting the Internet Connection

Let’s see how to get this fixed. For troubleshooting, use the Internet Connections troubleshooting wizard. To learn what troubleshooting wizards are, how to access them and get them started, check out this tutorial: How to Troubleshoot Network & Internet Problems.

From the list of Network and Internet troubleshooting wizards, select Internet Connections.

Before clicking on Next, click on the Advanced link.

There is an option which says "Apply repairs automatically". Check that option and click Next.

After a few seconds, the wizard asks what you want to troubleshoot. Click on "Troubleshoot my connection to the Internet".

The wizard now starts looking for problems and their possible root-causes. Wait until it finishes. It should not take longer than a minute.

When the wizard completes its detective job, it shows a summary of its findings. In our case, it says: "Security or firewall settings might be blocking the connection".

How to Interpret the Problem & Fix it?

All fine and dandy but... what next? All the wizard says is that you have a problem and no apparent solution. You knew this already, right?

There are two items that can cause issues here: your computer’s firewall and its settings or the firewall and security settings of the router that controls the wireless network to which you connected.

First, check the easy part: your own computer’s firewall. Does it have any weird settings that block your connection to the Internet? If things worked correctly with other wireless networks and you have not changed any settings when connecting to the new wireless network then, most probably, this is not the source of the problem.

The second and most likely problem is the router which manages the wireless network. Ask the owner of the network about any special settings he or she configured on the router. Is the router blocking access based on some specific rules?
I asked my friend, on who’s network I had this issue and he told me with a smile that he is using MAC filtering on his router, to block unwanted guests from using his connection to the Internet. What does it mean? Simply put, only computers with an approved MAC address can use his wireless connection. Therefore, he needed to approve my computer’s MAC, so that I can get Internet access when connecting to his wireless network.

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