Flushed the dns and restarted the computer and it didn't fix it. I then tried to reboot the modem and still no joy.
I am using a laptop and connecting to the Internet via Verizon Wireless using a Jetpack Mifi modem/wireless router.
Not sure if turning the modem off and on is considered rebooting the modem.The MS diagnosis suggests that if its a battery run modem/router (as this is) to then reset it. I'm a little afraid to do that right now until I can read up on what resetting does to my Verizon Wireless setup.
I did wonder if it was a Verizon issue so I tried the site on my Verizon cell phone and I was able to connect. So that might suggest it a modem/router issue.
Anyway thanks to everyone and if you have other thoughts I would be happy to hear them.