Why my Windows 7 Cannot connect to WiFi?

Go to Control PanelNetwork > InternetNetwork > Sharing Center. From the left pane, choose “manage wireless networks,” then delete your network connection. After that, choose “adapter properties.” Under “This connection uses the following items,” uncheck “AVG network filter driver” and retry connecting to the network.

How do I enable my wireless connection?

Go to the Start Menu and select Control Panel. Click the Network and Internet category and then select Networking and Sharing Center. From the options on the left-hand side, select Change adapter settings. Right-click on the icon for Wireless Connection and click enable.