If you have Wi-Fi enabled but your wired Ethernet connection is not working, the first thing you need to do is turn off Wi-Fi. Believe it or not, it could mean that Ethernet works. If Windows has access to both, it gives Ethernet the highest priority, but displays the Wi-Fi icon in the notification area. Right-click the icon, go to Open Network and Internet Settings then the Wi-Fi tab and turn it off.
Even if it does not solve your problem, it will make the tests below easier to run. You immediately see if Ethernet is working, which is exactly what you need to know.
If Wi-Fi is off and you still do not get a network connection, make sure Ethernet is enabled in the same Network and Internet Settings .
Find the right network. It is likely to say Local Area Connection . If you see Not Connected under the name, right click on it and select Enable. It may take a few seconds for the connection to start working, but no more.
If it does not fix it, connect the cable to another port on the router. If this fixes the problem, you have a faulty router. As long as you don't need all your ports, you can do it. Otherwise you can check the manual or the manufacturer to find out if it can be fixed. Worst case, you can replace it.
If that doesn't work, replace Ethernet cables – even if you have to borrow or buy a new cable to do so. If that solves the problem, you came up with a very simple solution.
If none of these tests solve the problem, the problem is with your computer. But is it the hardware or the operating system?
To find out, set up a Live Linux disk or flash drive and boot from it. If Ethernet does not work here is the problem with the hardware. If you are not really good at fixing computers, I suggest you take the computer to a professional.
But if Ethernet works in Linux, the problem is with Windows. Try reinstalling your Ethernet drivers:
Back to Windows, go to the Start menu search box, enter
Device Managerand select Device Manager .  Expand section Network Adapters .
- Right-click the Ethernet adapter (hint, it is without Wi-Fi or wireless in its name) and select Uninstall.  Confirm by clicking OK.
- Restart to reinstall the driver.
That should fix it.