Installed a new modem and Netgear router a few days ago. Now my second computer (Lenovo Windows 10) will not connect to certain web sites.

Get a lot of "the connection was reset".
I'm using Firefox and uninstalled it, then put it back in.

I can't connect the Lenovo directly to the router and try to reset it because it doesn't have an Ethernet port.

The Gateway numbers on both laptops are the same, but the IP address is one digit different and I assume that's correct.

The other laptop is a Toshiba and I can connect that one with an ethernet cable. That one is getting to sites ok.

If I manage to get to the Netgear site (with the Lenovo) it says "You are not connected to your router WIFI network". Yet I'm still on line.

I don't want to have to reset the modem as that causes the phone to go out also.

Could somebody give me a clue about where the problem is?

Thank you.