There are some cases when one of your network interfaces (Internet adapters) is disabled for one reason or another. To use the network interface, you need to enable it. Without enabling the network interface, your Internet connection might not even work, depending on which one you actually use to connect to the outside world.
Turning on an Internet Adapter Through the Control Panel
You can turn on an internet adapter simply by going to your control panel.Go to your Start menu, and you will find an icon labeled "Control Panel." Click this icon once, and wait until the window appears. Once in the control panel, you will see either an array of icons against a white background ("classic view") or a group of icons against a purple background ("category view"). If you are seeing the control panel in the classic view, then double-click on the "Network Connections" icon to get to your system's network configuration window. If you see the control panel in category view, then navigate to "Network and Internet Connections" by clicking the icon once, then click "Network Connections" near the bottom of the new screen that shows. In the network connection window, try to find the network connection that has been disabled. Each network connection has the name of its associated Internet adapter written on the bottom of the descriptive details (in gray) below its label. Disabled network connections appear with grayed-out icons and have a status of "Disabled". If your Internet adapter is not disabled after all, and your Internet connection is not working, then you could be having other problems with your Internet connection.
What to do If Your Connection Still Isn't Working
If your Internet connection still refuses to work after you enable your Internet adapter or find out that your Internet adapter was already enabled after all, there might still be a solution to your problem. Go to the same window where you saw your network connections and select the connection you use to connect to the Internet, right-click it, and click "Repair". After this, test to see if your connection is working. Try connecting to more than one website, just in case one of the websites is down. If all the websites still time out, you should contact your Internet service provider (ISP) to resolve your issue. Before calling them, make sure that the Ethernet cable between your computer and modem or router is securely connected. Also, try turning your modem or router off and on again and letting them reboot, and then see if your Internet connection works.