What is the make and model of your NIC(network interface card)? If you're working off of a motherboard's Ethernet port, first make sure you're on the latest BIOS update for your motherboard, then make sure you're on the latest OS version (version 20H2 for Windows 10) and then uninstall and reinstall your NIC's drivers. While installing said drivers, install in an elevated command, i.e, Right click installer>Run as Administrator.