: Look for a file named setup.exe or install.exe . Right-click it and choose Run as administrator .
: For custom builds, visit the Intel Download Center or the Realtek Downloads page for the latest LAN drivers.
Fix Ethernet connection problems in Windows - Microsoft Support
: Right-click the Start button and select Device Manager . Expand Network adapters . Look for Your Card : You will likely see names like Realtek PCIe GbE Family Controller Go to product viewer dialog for this item. , Intel Ethernet Connection , or "Unknown Device".