If you are using a wired connection to the modem or router, it could be the ethernet cable that needs replacing so try a new one.
If that doesn't help, turn off your router or modem and restart it.
Also restart your laptop.
If you are using a wired connection to the modem or router, it could be the ethernet cable that needs replacing so try a new one.
If that doesn't help, turn off your router or modem and restart it.
Also restart your laptop.