The first is also the most important:
Update your Driver
Specifically, your motherboard and the Ethernet drivers. Visit the manufacturer’s website for your motherboard brand, search for your specific model, download and install the drivers. Ensuring that the correct Ethernet drivers for your motherboard are installed is extremely important. You will usually find them under Support or Drivers on the manufacturer’s website.
Uninstall your Network Adapter
Access Device Manager by right-clicking on the Windows icon and selecting it. Right-click and uninstall the network adapter for your ethernet found under “Network Adapters”. Now, choose Action> Scan for hardware changes and let Windows find the updated and installed Ethernet drivers.
Check Adapter Settings
Right-click on the Windows icon, select Network Connections. It will display a list of your adapters. Right-click on the one you are having problems with. Select “Properties”. Make sure Internet Protocol version 6 and Internet Protocol 4. If not, do so.
Update / Reinstall VPN and / or Antivirus / Firewall
If you use a VPN, uninstall the adapter and software and reinstall it. Part of upgrading to a new operating system is making sure you’ve got the latest version of a large number of built-in apps, and a VPN can be quite specific about how virtual adapters are set up.
If you have anti-virus software or have third-party firewall software, do the same. Removing and installing AV/firewall software might resolve some problems with restoring the Internet connection after upgrading the operating system.
Change your IP
You can do about the same effect by running the network troubleshooter, but let’s go deeper into releasing and renewing your IP address, as this can also help with a rush.
1. Press Windows Key + X and select “Command Prompt (admin)”.
2. Type ipconfig / release and press Enter.
3. Then type ipconfig / renew and press Enter.
4. Type Exit and press Enter.