Can't connect to internet via Belkin router (using Dell laptops)

My friend has a belkin router and I’ve tried 2 of my dell laptops at his house and cannot get connected to the internet. I’ve contacted Belkin support and I was told there is a firewall blocking me from accessing the internet. They suggested I contact Dell. Another person suggested it may be my Avast firewall.

Can anyone possibly help me? I’ve used my laptops at various places (even different states) and have never had a problem connecting before.

Thanks!

It’s mostlikey that your friend has his WIFI password protected
Without the key, you can’t access his service.