Summary
Check Hardware ID: Right-click the "Ethernet Controller" in Device Manager, go to Properties > Details > Hardware Ids. Search for the VEN (Vendor) and DEV (Device) codes to find the exact manufacturer (Realtek, Intel, etc.).
Download and Extract: Drivers often come in ZIP files. Extract them to a folder on your desktop.
Pro Tip: If you cannot find the model name, go to Device Manager, right-click the "Ethernet Controller" (which likely has a yellow exclamation mark), select Properties > Details, and choose Hardware IDs. Copy the VEN_XXXX&DEV_XXXX code into a search engine to identify the exact manufacturer and driver needed. Step 3: Where to Download Drivers