Hi, I'm Robinson, and I’m happy to help you today.
I know how frustrating this may be for you but I'll do my very best to help you.
Here is some troubleshooting that you can try and should fix the problem.
Solution 1: Run the hardware troubleshooter
1-Right-click on Start then click on Run
2-Type: msdt.exe -id DeviceDiagnostic and click on Ok
3-Click on Next and follow the instructions
Solution 2: Run the Internet troubleshooter
1-Click on Start then click on Settings
2-Click on Update & Security
3-Click on Troubleshoot then click on additional troubleshooter
4-Select the Internet connections and click on Run
Solution 3:Reinstall driver. You should be able to find the correct driver for your Ethernet adapter on the website of the manufacturer of your motherboard or computer.
Solution 4: Restore Windows to a previous point before the problem.
1-Restart your computer while holding the SHIFT button
2-The Advanced Startup menu will open on the boot.
3-Go to Troubleshoot.
4-Now, go to Advanced Options > System restore
5-Select a restore point and click on next to restore