If you work with Wi-Fi, but your wired Ethernet connection does not work, you must first turn off the Wi-Fi. Believe it or not, this can tell you that the ethernet works. If Windows has access to both, Ethernet is given the highest priority, but the Wi-Fi icon is displayed in the system tray. Right click on the icon, go to Open network and internet settings and then on the Wi-Fi tab and switch off.
Even if that doesn't solve your problem, the tests below will be performed more easily. You immediately see if ethernet works, and that is exactly what you need to know.
If WiFi is disabled and you still cannot get a network connection, make sure that Ethernet is enabled in the same way Network and Internet Settings section.
Find the correct network. It will probably say Local Area Connection . If you see Unconnected 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 than that.
If this does not resolve the problem, connect the cable to another port on the router. If that solves the problem, you have a faulty router. As long as you do not need all your gates, you can make ends meet. Otherwise, consult the manual or manufacturer for more information about a solution. In the worst case, you can replace it.
If that doesn't work, swap Ethernet cables – even if you have to borrow or buy a new cable for that. If that solved the problem, you came up with a very simple solution.
If none of these tests resolves the problem, the problem is with your PC. But is it the hardware or the operating system?
Set up a Live Linux drive or flash drive for this and start from that. If Ethernet does not work here, the problem is with the hardware. Unless you are really good at repairing computers, I recommend taking the PC to a professional.
But if Ethernet works in Linux, the problem lies with Windows. Try reinstalling the Ethernet driver & # 39; s:
In Windows, return to the Start menu search field, enter
Device Managerand select Device Management .  Expand the Network Adapters section.
- Right-click on the Ethernet adapter (hint, this is the one without Wi-Fi or wireless in its name) and select Remove.  Confirm by clicking on OK.
- Restart to reinstall the driver.
That should remedy it.