New
#11
We are venturing into a part that I am not really comfortable with, network is/has always been a mystery to me, a crap shoot if you want.
Being said that, bottom right of your screen, where you see the little monitor, time and date, that is your network/internet access, click on it and then click on "Open network and sharing center", click on Local Area Connections and then on your Properties, un-tick your IPv6, restart and try again.
Your modem may or may not be the culprit here but I don't really know how you can test this. You may also be getting a bad connection, ping, etc but I will let the most gurus here help with that since I am only going to get you in more trouble