Having a wired internet connection is a very important thing to have, especially when you need your device to work smoothly and continuously. However, sometimes your wired connection stops working or becomes unstable for various reasons like antivirus blocks and malware programs which stop the internet connectivity regardless of whether you have a cable plugged in or not, internet outage on the provider’s end, faulty router/ modem etc.
There are a few things that you can try to resolve this problem and get back your stable internet connection. One is to restart the router/modem, and your computer as well. This is a simple solution and can sometimes fix the issue with just a simple turn-off. You can also try connecting your computer to a different port on the router or modem in case the current port is blocked or has a bad connection.
Another method to solve this problem is to make sure that your Ethernet network is enabled in the Network and Internet settings. Check for that by opening 'Start' and typing 'Network Connection'. If it is disabled, you should disable it and then re-enable it to see if it works.
You can also try connecting your device to a different router in case your current one has a faulty ethernet cable. It is best to use a new ethernet cable to avoid further issues in the future. Finally, you can always contact your internet service provider to find a better solution which may include buying a new ethernet cable or modem.