While you might blame your router or ISP, the real culprit is often much smaller:
Search for your model number, navigate to the "Drivers & Downloads" section, and filter by "LAN" or "Ethernet." Download the latest version available. how to update ethernet driver
To update your Ethernet driver on Windows: While you might blame your router or ISP,
Device Manager is the quickest tool for driver updates. It searches Microsoft servers for verified software. Press Windows Key + X . Select . Expand Network adapters . Right-click your Ethernet controller. Click Update driver . Choose Search automatically for drivers . Follow the on-screen prompts. Restart your computer. Download from Manufacturer Websites how to update ethernet driver