1.Check that the LAN cable is connected to the ethernet port on the computer and the router
2.Checked the LAN light on the modem is on
3.Check the Network connection is not disabled
Start > Setting > Network & Internet > Ethernet >
If the Local Area Connection is "Disabled" : Right click and "Enable"
4.Check TCP/IP has not got any manual settings
5. Highlight "Internet Protocol Version 4 (TCP/IPv4)"
6. Confirm "Obtain an IP address automatically" and "Obtain DNS server address automatically" is selected
7. Disable IPv6 "Uncheck the Internet Protocol (TCP/IP) Version 6".
Please reboot the computer to see if it works a better option.